Wintrust Financial (WTFC) 10-Q 8 Nov 22 2022 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2022	Oct. 31, 2022
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	001-35077
Entity Registrant Name	WINTRUST FINANCIAL CORP
Entity Incorporation, State or Country Code	IL
Entity Tax Identification Number	36-3873352
Entity Address, Address Line One	9700 W. Higgins Road, Suite 800
Entity Address, City or Town	Rosemont
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60018
City Area Code	847
Local Phone Number	939-9000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		60,765,273
Entity Central Index Key	0001015328
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Stock, no par value
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	WTFC
Security Exchange Name	NASDAQ
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, no par value
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, no par value
Trading Symbol	WTFCM
Security Exchange Name	NASDAQ
6.875% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E, no par value
Entity Information [Line Items]
Title of 12(b) Security	6.875% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E, no par value
Trading Symbol	WTFCP
Security Exchange Name	NASDAQ

CONSOLIDATED STATEMENTS OF COND

CONSOLIDATED STATEMENTS OF CONDITION - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Assets
Cash and due from banks	$ 489,590	$ 411,150	$ 462,244
Federal funds sold and securities purchased under resale agreements	57	700,055	55
Interest-bearing deposits with banks	3,968,605	5,372,603	5,232,315
Available-for-sale securities, at fair value	2,923,653	2,327,793	2,373,478
Held-to-maturity securities, at amortized cost, net of allowance for credit losses of $310, $78 and $83 at September 30, 2022, December 31, 2021 and September 30, 2021, respectively ($2.7 billion, $2.9 billion and $2.7 billion fair value at September 30, 2022, December 31, 2021 and September 30, 2021, respectively)	3,389,842	2,942,285	2,736,722
Trading account securities	179	1,061	1,103
Equity securities with readily determinable fair value	114,012	90,511	88,193
Federal Home Loan Bank and Federal Reserve Bank stock	178,156	135,378	135,408
Brokerage customer receivables	20,327	26,068	26,378
Mortgage loans held-for-sale, at fair value	376,160	817,912	925,312
Loans, net of unearned income	38,167,613	34,789,104	33,264,043
Allowance for loan losses	(315,028)	(299,653)	(296,055)
Premises, software and equipment, net	763,029	766,405	748,872
Lease investments, net	244,822	242,082	243,933
Accrued interest receivable and other assets	1,316,305	1,084,115	1,166,917
Goodwill	653,079	655,149	645,792
Other acquisition-related intangible assets	23,620	28,307	30,118
Total assets	52,382,939	50,142,143	47,832,271
Deposits:
Non-interest-bearing	13,529,277	14,179,980	13,255,417
Interest-bearing	29,267,914	27,915,605	26,697,141
Total deposits	42,797,191	42,095,585	39,952,558
Federal Home Loan Bank advances	2,316,071	1,241,071	1,241,071
Other borrowings	447,215	494,136	504,527
Subordinated notes	437,260	436,938	436,811
Junior Subordinated Debentures	253,566	253,566	253,566
Trade date securities payable	0	0	1,348
Accrued interest payable and other liabilities	1,493,656	1,122,159	1,032,073
Total liabilities	47,744,959	45,643,455	43,421,954
Shareholders’ Equity:
Common stock, no par value; $1.00 stated value; 100,000,000 shares authorized at September 30, 2022, December 31, 2021 and September 30, 2021; 60,743,335 shares issued at September 30, 2022, 58,891,780 shares issued at December 31, 2021 and 58,793,715 shares issued at September 30, 2021	60,743	58,892	58,794
Surplus	1,891,621	1,685,572	1,674,062
Treasury stock, at cost, no shares at September 30, 2022, 1,837,689 shares at December 31, 2021, and 1,837,689 shares at September 30, 2021	0	(109,903)	(109,903)
Retained earnings	2,731,844	2,447,535	2,373,447
Accumulated other comprehensive (loss) income	(458,728)	4,092	1,417
Total shareholders’ equity	4,637,980	4,498,688	4,410,317
Total liabilities and shareholders’ equity	52,382,939	50,142,143	47,832,271
Series D - $25 liquidation value; 5,000,000 shares issued and outstanding at September 30, 2022, December 31, 2021 and September 30, 2021
Shareholders’ Equity:
Preferred stock, no par value; 20,000,000 shares authorized:	125,000	125,000	125,000
Series E - $25,000 liquidation value; 11,500 shares issued and outstanding at September 30, 2022, December 31, 2021 and September 30, 2021
Shareholders’ Equity:
Preferred stock, no par value; 20,000,000 shares authorized:	287,500	287,500	287,500
Loans
Assets
Loans, net of unearned income	38,167,613	34,789,104	33,264,043
Allowance for loan losses	(246,110)	(247,835)	(248,612)
Net loans	$ 37,921,503	$ 34,541,269	$ 33,015,431

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Held-to-maturity securities, allowance for credit loss	$ 310	$ 78	$ 83
Held-to-maturity securities, fair value	$ 2,679,326	$ 2,900,694	$ 2,699,480
Preferred stock, authorized (in shares)	20,000,000	20,000,000	20,000,000
Common stock, stated value (usd per share)	$ 1	$ 1	$ 1
Common stock, authorized (in shares)	100,000,000	100,000,000	100,000,000
Common stock, issued (in shares)	60,743,335	58,891,780	58,793,715
Treasury stock (in shares)	0	1,837,689	1,837,689
Series D Preferred Stock
Preferred stock, liquidation value per share (usd per share)	$ 25	$ 25	$ 25
Preferred stock, issued (in shares)	5,000,000	5,000,000	5,000,000
Preferred stock, outstanding (in shares)	5,000,000	5,000,000	5,000,000
Series E Preferred Stock
Preferred stock, liquidation value per share (usd per share)	$ 25,000	$ 25,000	$ 25,000
Preferred stock, issued (in shares)	11,500	11,500	11,500
Preferred stock, outstanding (in shares)	11,500	11,500	11,500

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest income
Interest and fees on loans	$ 402,689	$ 285,587	$ 1,008,888	$ 844,388
Mortgage loans held-for-sale	5,371	7,716	17,198	24,935
Interest-bearing deposits with banks	15,621	2,000	23,098	4,352
Federal funds sold and securities purchased under resale agreements	1,845	0	3,640	0
Investment securities	38,569	25,189	107,508	68,076
Trading account securities	7	3	16	6
Federal Home Loan Bank and Federal Reserve Bank stock	2,109	1,777	5,704	5,291
Brokerage customer receivables	267	185	646	457
Total interest income	466,478	322,457	1,166,698	947,505
Interest expense
Interest on deposits	45,916	19,305	79,755	71,547
Interest on Federal Home Loan Bank advances	6,812	4,931	16,506	14,658
Interest on other borrowings	4,008	2,501	8,981	7,678
Interest on subordinated notes	5,485	5,480	16,484	16,469
Interest on junior subordinated debentures	2,809	2,744	6,426	8,172
Total interest expense	65,030	34,961	128,152	118,524
Net interest income	401,448	287,496	1,038,546	828,981
Provision for credit losses	6,420	(7,916)	30,943	(68,562)
Net interest income after provision for credit losses	395,028	295,412	1,007,603	897,543
Non-interest income
Revenue from contracts with customers	55,723	53,219	165,519	151,720
Mortgage banking	27,221	55,794	137,766	219,872
(Losses) gains on investment securities, net	(3,103)	(2,431)	(13,682)	8
Fees from covered call options	1,366	1,157	6,177	2,545
Trading (losses) gains, net	(7)	58	4,058	39
Operating lease income, net	12,644	12,807	43,126	39,487
Other	15,888	23,409	48,362	59,438
Total non-interest income	101,482	136,474	367,214	452,353
Non-interest expense
Salaries and employee benefits	176,095	170,912	515,776	524,538
Software and equipment	24,126	22,029	71,186	63,807
Operating lease equipment depreciation	9,448	10,013	27,930	30,733
Occupancy, net	17,727	18,158	53,202	55,841
Data processing	7,767	7,104	23,282	20,072
Advertising and marketing	16,600	13,443	45,139	33,294
Professional fees	7,544	7,052	23,821	21,943
Amortization of other acquisition-related intangible assets	1,492	1,877	4,680	5,923
FDIC insurance	7,186	6,750	21,864	19,713
Other real estate owned expense, net	229	(1,531)	(509)	(1,013)
Other	28,255	26,337	83,064	74,294
Total non-interest expense	296,469	282,144	869,435	849,145
Income before taxes	200,041	149,742	505,382	500,751
Income tax expense	57,080	40,605	140,517	133,357
Net income	142,961	109,137	364,865	367,394
Preferred stock dividends	6,991	6,991	20,973	20,973
Net income applicable to common shares	$ 135,970	$ 102,146	$ 343,892	$ 346,421
Net income per common share-Basic (usd per share)	$ 2.24	$ 1.79	$ 5.86	$ 6.08
Net income per common share-Diluted (usd per share)	2.21	1.77	5.78	6
Cash dividends declared per common share (usd per share)	$ 0.34	$ 0.31	$ 1.02	$ 0.93
Weighted average common shares outstanding (in shares)	60,738	57,000	58,679	56,985
Dilutive potential common shares (in shares)	837	753	814	728
Average common shares and dilutive common shares (in shares)	61,575	57,753	59,493	57,713
Wealth management
Non-interest income
Revenue from contracts with customers	$ 33,124	$ 31,531	$ 95,887	$ 91,530
Service charges on deposit accounts
Non-interest income
Revenue from contracts with customers	$ 14,349	$ 14,149	$ 45,520	$ 39,434

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 142,961	$ 109,137	$ 364,865	$ 367,394
Unrealized losses on available-for-sale securities
Before tax	(193,262)	(14,141)	(565,815)	(68,555)
Tax effect	51,504	3,767	150,789	18,290
Net of tax	(141,758)	(10,374)	(415,026)	(50,265)
Reclassification of net gains on available-for-sale securities included in net income
Before tax	12	350	262	1,144
Tax effect	(3)	(94)	(70)	(307)
Net of tax	9	256	192	837
Reclassification of amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale
Before tax	44	54	130	158
Tax effect	(12)	(14)	(35)	(42)
Net of tax	32	40	95	116
Net unrealized losses on available-for-sale securities	(141,799)	(10,670)	(415,313)	(51,218)
Unrealized (losses) gains on derivative instruments
Before tax	(76,441)	9,004	(34,585)	51,008
Tax effect	20,371	(2,400)	9,205	(13,594)
Net unrealized (losses) gains on derivative instruments	(56,070)	6,604	(25,380)	37,414
Foreign currency adjustment
Before tax	(22,630)	(5,858)	(28,048)	(248)
Tax effect	4,808	1,208	5,921	87
Net foreign currency adjustment	(17,822)	(4,650)	(22,127)	(161)
Total other comprehensive loss	(215,691)	(8,716)	(462,820)	(13,965)
Comprehensive (loss) income	$ (72,730)	$ 100,421	$ (97,955)	$ 353,429

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Preferred stock	Common stock	Surplus	Treasury stock	Retained earnings	Accumulated other comprehensive income (loss)
Beginning balance at Dec. 31, 2020	$ 4,115,995	$ 412,500	$ 58,473	$ 1,649,990	$ (100,363)	$ 2,080,013	$ 15,382
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	367,394					367,394
Other comprehensive loss, net of tax	(13,965)						(13,965)
Cash dividends declared on common stock	(52,987)					(52,987)
Dividends on preferred stock	(20,973)					(20,973)
Common stock repurchases under authorized program	(9,540)				(9,540)
Stock-based compensation	9,437			9,437
Common stock issued for:
Exercise of stock options and warrants	10,559		246	10,313
Restricted stock awards	0		13	(13)
Employee stock purchase plan	2,548		38	2,510
Director compensation plan	1,849		24	1,825
Ending balance at Sep. 30, 2021	4,410,317	412,500	58,794	1,674,062	(109,903)	2,373,447	1,417
Beginning balance at Jun. 30, 2021	4,339,011	412,500	58,770	1,669,002	(100,363)	2,288,969	10,133
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	109,137					109,137
Other comprehensive loss, net of tax	(8,716)						(8,716)
Cash dividends declared on common stock	(17,668)					(17,668)
Dividends on preferred stock	(6,991)					(6,991)
Common stock repurchases under authorized program	(9,540)				(9,540)
Stock-based compensation	3,243			3,243
Common stock issued for:
Exercise of stock options and warrants	318		8	310
Restricted stock awards	0		3	(3)
Employee stock purchase plan	928		13	915
Director compensation plan	595			595
Ending balance at Sep. 30, 2021	4,410,317	412,500	58,794	1,674,062	(109,903)	2,373,447	1,417
Beginning balance at Dec. 31, 2021	4,498,688	412,500	58,892	1,685,572	(109,903)	2,447,535	4,092
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	364,865					364,865
Other comprehensive loss, net of tax	(462,820)						(462,820)
Cash dividends declared on common stock	(59,583)					(59,583)
Dividends on preferred stock	(20,973)					(20,973)
Stock-based compensation	23,852			23,852
Common stock issued for:
New issuance, net of cost	285,721		1,612	174,206	109,903
Exercise of stock options and warrants	3,738		88	3,650
Restricted stock awards	0		61	(61)
Employee stock purchase plan	2,529		31	2,498
Director compensation plan	1,963		59	1,904
Ending balance at Sep. 30, 2022	4,637,980	412,500	60,743	1,891,621	0	2,731,844	(458,728)
Beginning balance at Jun. 30, 2022	4,727,623	412,500	60,722	1,880,913	0	2,616,525	(243,037)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	142,961					142,961
Other comprehensive loss, net of tax	(215,691)						(215,691)
Cash dividends declared on common stock	(20,651)					(20,651)
Dividends on preferred stock	(6,991)					(6,991)
Stock-based compensation	8,963			8,963
Common stock issued for:
Exercise of stock options and warrants	198		4	194
Restricted stock awards	0		5	(5)
Employee stock purchase plan	894		12	882
Director compensation plan	674		0	674
Ending balance at Sep. 30, 2022	$ 4,637,980	$ 412,500	$ 60,743	$ 1,891,621	$ 0	$ 2,731,844	$ (458,728)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Cash dividends declared on common stock (usd per share)	$ 0.34	$ 0.31	$ 1.02	$ 0.93
Series D Preferred Stock
Dividends on preferred stock (usd per share)	0.41	0.41	1.23	1.23
Series E Preferred Stock
Dividends on preferred stock (usd per share)	$ 429.69	$ 429.69	$ 1,289.07	$ 1,289.07

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating Activities:
Net income	$ 364,865	$ 367,394
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	30,943	(68,562)
Depreciation, amortization and accretion, net	64,726	75,389
Stock-based compensation expense	23,852	9,437
Amortization of premium on securities, net	2,048	5,188
Accretion of discount and deferred fees on loans, net	(17,237)	(68,413)
Mortgage servicing rights fair value changes, net of economic hedge	(41,087)	15,685
Non-designated derivatives fair value changes, net	957	(378)
Originations and purchases of mortgage loans held-for-sale	(2,377,249)	(5,504,906)
Early buy-out exercises of mortgage loans held-for-sale guaranteed by U.S. government agencies, net of subsequent paydowns or payoffs	69,605	(9,747)
Proceeds from sales of mortgage loans held-for-sale	2,664,774	6,014,689
Bank owned life insurance (“BOLI”) loss (income)	588	(4,620)
Decrease (increase) in trading securities, net	882	(432)
Decrease (increase) in brokerage customer receivables, net	5,741	(8,942)
Gains on mortgage loans sold	(37,022)	(178,927)
Losses (gains) on investment securities, net	13,682	(8)
Losses (gains) on sales of premises and equipment, net, and sale of related deposit liabilities	2,114	(3,649)
Gains on sales and fair value adjustments of other real estate owned, net	(805)	(2,134)
Decrease in accrued interest receivable and other assets, net	22,542	121,657
Increase (decrease) in accrued interest payable and other liabilities, net	261,253	(27,720)
Net Cash Provided by Operating Activities	1,055,172	731,001
Investing Activities:
Proceeds from maturities and calls of available-for-sale securities	275,336	1,101,149
Proceeds from maturities and calls of held-to-maturity securities	174,211	177,668
Proceeds from sales of available-for-sale securities	0	192,227
Proceeds from sales of equity securities with readily determinable fair value	21,753	9,759
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	1,232	2,467
Purchases of available-for-sale securities	(1,438,270)	(682,172)
Purchases of held-to-maturity securities	(623,011)	(2,537,242)
Purchases of equity securities with readily determinable fair value	(54,495)	(6,000)
Purchases of equity securities without readily determinable fair value	(9,892)	(7,295)
(Purchases) redemptions of Federal Home Loan Bank and Federal Reserve Bank stock, net	(42,778)	180
Distributions from (contributions to) investments in partnerships, net	3,506	(2,757)
Proceeds from sales of other real estate owned	3,802	7,263
Decrease in securities purchased under resale agreements with terms exceeding three months, net	700,000	0
Decrease (increase) in interest-bearing deposits with banks, net	1,400,793	(428,917)
Increase in loans, net	(3,324,304)	(1,169,636)
Redemption of BOLI	960	0
Purchases of premises and equipment, net	(37,462)	(23,434)
Net Cash Used for Investing Activities	(2,948,619)	(3,366,740)
Financing Activities:
Increase in deposit accounts, net	701,597	2,863,778
Decrease in other borrowings, net	(18,103)	(15,716)
Increase in Federal Home Loan Bank advances, net	1,075,000	12,629
Proceeds from common stock offering, net	285,721	0
Cash payments to settle contingent consideration liabilities recognized in business combinations	0	(16,583)
Issuance of common shares resulting from the exercise of stock options, employee stock purchase plan and conversion of common stock warrants	8,230	14,956
Common stock repurchases under authorized program	0	(9,540)
Dividends paid	(80,556)	(73,960)
Net Cash Provided by Financing Activities	1,971,889	2,775,564
Net Increase in Cash and Cash Equivalents	78,442	139,825
Cash and Cash Equivalents at Beginning of Period	411,205	322,474
Cash and Cash Equivalents at End of Period	$ 489,647	$ 462,299

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The interim consolidated financial statements of Wintrust Financial Corporation and its subsidiaries (collectively, “Wintrust” or the “Company”) presented herein are unaudited, but in the opinion of management, reflect all necessary adjustments of a normal or recurring nature for a fair presentation of results as of the dates and for the periods covered by the interim consolidated financial statements. The accompanying interim consolidated financial statements are unaudited and do not include information or footnotes necessary for a complete presentation of financial condition, results of operations or cash flows in accordance with U.S. generally accepted accounting principles (“GAAP”). The interim unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 (“2021 Form 10-K”). Operating results reported for the period are not necessarily indicative of the results which may be expected for the entire year. Reclassifications of certain prior period amounts have been made to conform to the current period presentation. The preparation of the financial statements requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities. Management believes that the estimates made are reasonable; however, changes in estimates may be required if economic or other conditions develop differently from management’s expectations. Certain policies and accounting principles inherently have a greater reliance on the use of estimates, assumptions and judgments and as such have a greater possibility of producing results that could be materially different than originally reported. Management views critical accounting policies to be those which are highly dependent on subjective or complex judgments, estimates and assumptions, and where changes in those estimates and assumptions could have a significant impact on the financial statements. Management currently views the determination of the allowance for credit losses, including the allowance for loan losses, the allowance for unfunded commitment losses and the allowance for held-to-maturity securities losses, estimations of fair value, the valuations required for impairment testing of goodwill, the valuation and accounting for derivative instruments and income taxes as the accounting areas that require the most subjective and complex judgments, and as such could be the most subject to revision as new information becomes available. Descriptions of the Company’s significant accounting policies are included in Note 1 - Summary of Significant Accounting Policies of the 2021 Form 10-K. In preparation of these financial statements, subsequent events were evaluated through the time the financial statements were issued. Financial statements are considered issued when they are widely distributed to all shareholders and other financial statement users or filed with the SEC.

Recent Accounting Developments

Recent Accounting Developments	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Recent Accounting Developments	Recent Accounting Developments Debt In August 2020, the FASB issued ASU No. 2020-06, “Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity,” which includes provisions for reducing the number of accounting models used in accounting for convertible debt instruments and convertible preferred stock, amending derivatives and earnings-per-share (EPS) guidance and expanding disclosures for convertible debt instruments and EPS. The Company adopted ASU No. 2020-06 as of January 1, 2022. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Issuer’s Accounting for Modifications or Exchanges of Freestanding Equity-Classified Written Call Options In May 2021, the FASB issued ASU No. 2021-04, “Earnings Per Share (Topic 260), Debt—Modifications and Extinguishments (Subtopic 470-50), Compensation—Stock Compensation (Topic 718), and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity-Classified Written Call Options,” which requires an issuer to account for any modification or exchange of the terms or conditions of a freestanding written call option classified as equity, such as warrants, that remains classified as equity as an exchange of the original instrument for a new instrument and provides a framework for measuring and recognizing the effect of the exchange as an adjustment to either equity or expense. The Company adopted ASU No. 2021-04 as of January 1, 2022 under a prospective approach. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Leases - Certain Leases with Variable Lease Payments In July 2021, the FASB issued ASU No. 2021-05, “Leases (Topic 842): Lessors – Certain Leases with Variable Lease Payments” which amends lessor lease classification requirements to allow leases with variable lease payments that are not dependent on a reference index or rate to be classified and accounted for as an operating lease, provided the lease would have been classified as a sales-type or direct financing lease and the lessor would have otherwise recognized a day-one loss. The Company adopted ASU No. 2021-05 as of January 1, 2022. As the Company has adopted ASC Topic 842, this guidance was applied retrospectively to leases that commenced or were modified after the adoption of ASC Topic 842 and prospectively to leases that will commence or be modified after January 1, 2022. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Fair Value Hedging - Portfolio Layer Method In March 2022, the FASB issued ASU No. 2022-01, “Derivatives and Hedging (Topic 815): Fair Value Hedging - Portfolio Layer Method” which expands the current last-of-layer method by allowing multiple hedged layers to be designated for a single closed portfolio of financial assets or one or more beneficial interests secured by a portfolio of financial instruments. This guidance is effective for fiscal years beginning after December 15, 2022, including interim periods therein, and is to be applied under a prospective approach. Early adoption is permitted. The Company is currently evaluating the impact of the updated guidance on the Company’s consolidated financial statements. Troubled Debt Restructurings and Vintage Disclosures In March 2022, the FASB issued ASU No. 2022-02, “Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures” which eliminates the separate recognition and measurement guidance for Troubled Debt Restructurings ("TDRs") by creditors, while enhancing disclosure requirements for certain loan refinancing and restructurings by creditors when a borrower is experiencing financial difficulty, and requiring entities to disclose current-period gross write-offs by year of origination for certain financing receivables and net investments in leases. This guidance is effective for fiscal years beginning after December 15, 2022, including interim periods therein, with early adoption permitted. If the Company elects to early adopt in an interim period, the guidance should be applied as of the beginning of the fiscal year that includes the interim period. The Company may elect to early adopt the amendments related to TDRs separately from the amendments related to vintage disclosures. The amendments related to disclosures for loan modifications and the vintage disclosures should be applied under a prospective approach, while the guidance on TDRs should be applied using either a prospective or modified retrospective approach. The Company is currently evaluating the impact of the updated guidance on the Company’s consolidated financial statements and plans to adopt the new guidance as of January 1, 2023. Fair Value Measurement - Equity Securities with Contractual Sale Restrictions

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Business Combinations	Business CombinationsOn November 15, 2021, the Company completed its acquisition of certain assets from The Allstate Corporation (“Allstate”). Through this business combination, the Company acquired approximately $581.6 million of loans, net of allowance for credit losses measured on the acquisition date. The loan portfolio was comprised of approximately 1,800 loans to Allstate agents nationally. In addition to acquiring the loans, the Company became the national preferred provider of loans to Allstate agents. In connection with the loan acquisition, a team of Allstate agency lending specialists joined the Company to augment and expand Wintrust’s existing insurance agency finance business. For more information regarding these loans, see Note 6 - Loans in Item 1 of this report. As the transaction was determined to be a business combination, the Company recorded goodwill of approximately $9.3 million on the acquisition.

Cash and Cash Equivalents

Cash and Cash Equivalents	9 Months Ended
	Sep. 30, 2022
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents	Cash and Cash EquivalentsFor purposes of the Consolidated Statements of Cash Flows, the Company considers cash and cash equivalents to include cash on hand, cash items in the process of collection, non-interest bearing amounts due from correspondent banks, federal funds sold and securities purchased under resale agreements with original maturities of three months or less. These items are included within the Company’s Consolidated Statements of Condition as cash and due from banks, and federal funds sold and securities purchased under resale agreements.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The following tables are a summary of the investment securities portfolios as of the dates shown: September 30, 2022 (In thousands) Amortized Gross Gross Fair Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 50,000 — (5,987) 44,013 Municipal 181,612 127 (7,738) 174,001 Corporate notes: Financial issuers 93,994 — (7,951) 86,043 Other 1,000 — (10) 990 Mortgage-backed: (1) Mortgage-backed securities 3,052,778 — (513,978) 2,538,800 Collateralized mortgage obligations 98,922 — (19,116) 79,806 Total available-for-sale securities $ 3,478,306 $ 127 $ (554,780) $ 2,923,653 Held-to-maturity securities U.S. government agencies $ 314,618 $ — $ (72,723) $ 241,895 Municipal 180,304 203 (7,791) 172,716 Mortgage-backed: (1) Mortgage-backed securities 2,679,862 — (600,335) 2,079,527 Collateralized mortgage obligations 166,965 — (24,475) 142,490 Corporate notes 48,403 — (5,705) 42,698 Total held-to-maturity securities $ 3,390,152 $ 203 $ (711,029) $ 2,679,326 Less: Allowance for credit losses (310) Held-to-maturity securities, net of allowance for credit losses $ 3,389,842 Equity securities with readily determinable fair value $ 120,073 $ 2,233 $ (8,294) $ 114,012 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime. December 31, 2021 Amortized Gross Gross Fair (In thousands) Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 50,158 2,349 — 52,507 Municipal 161,618 4,193 (217) 165,594 Corporate notes: Financial issuers 96,878 418 (2,599) 94,697 Other 1,000 7 — 1,007 Mortgage-backed: (1) Mortgage-backed securities 1,901,005 32,830 (25,854) 1,907,981 Collateralized mortgage obligations 105,710 297 — 106,007 Total available-for-sale securities $ 2,316,369 $ 40,094 $ (28,670) $ 2,327,793 Held-to-maturity securities U.S. government agencies $ 180,192 $ 201 $ (3,314) $ 177,079 Municipal 187,486 9,544 (223) 196,807 Mortgage-backed: (1) Mortgage-backed securities 2,530,730 864 (47,622) 2,483,972 Collateralized mortgage obligations — — — — Corporate notes 43,955 — (1,119) 42,836 Total held-to-maturity securities $ 2,942,363 $ 10,609 $ (52,278) $ 2,900,694 Less: Allowance for credit losses (78) Held-to-maturity securities, net of allowance for credit losses $ 2,942,285 Equity securities with readily determinable fair value $ 86,989 $ 5,354 $ (1,832) $ 90,511 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime. September 30, 2021 Amortized Gross Gross Fair (In thousands) Available-for-sale securities U.S. Treasury $ 6,000 $ — $ — $ 6,000 U.S. government agencies 50,163 3,112 — 53,275 Municipal 170,612 4,202 (214) 174,600 Corporate notes: Financial issuers 98,848 500 (1,241) 98,107 Other 1,000 11 — 1,011 Mortgage-backed: (1) Mortgage-backed securities 1,913,139 44,931 (25,434) 1,932,636 Collateralized mortgage obligations 107,657 192 — 107,849 Total available-for-sale securities $ 2,347,419 $ 52,948 $ (26,889) $ 2,373,478 Held-to-maturity securities U.S. government agencies $ 176,143 $ 482 $ (2,878) $ 173,747 Municipal 190,662 10,321 (334) 200,649 Mortgage-backed: (1) Mortgage-backed securities 2,318,309 1,924 (46,102) 2,274,131 Collateralized mortgage obligations — — — — Corporate Notes 51,691 — (738) 50,953 Total held-to-maturity securities $ 2,736,805 $ 12,727 $ (50,052) $ 2,699,480 Less: Allowance for credit losses (83) Held-to-maturity securities, net of allowance for credit losses $ 2,736,722 Equity securities with readily determinable fair value $ 83,909 $ 5,678 $ (1,394) $ 88,193 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime. Equity securities without readily determinable fair values totaled $43.9 million as of September 30, 2022. Equity securities without readily determinable fair values are included as part of accrued interest receivable and other assets in the Company’s Consolidated Statements of Condition. The Company monitors its equity investments without readily determinable fair values to identify potential transactions that may indicate an observable price change in orderly transactions for the identical or a similar investment of the same issuer, requiring adjustment to its carrying amount. The Company recorded no upward and no downward adjustments related to such observable price changes for the three and nine months ended September 30, 2022. The Company conducts a quarterly assessment of its equity securities without readily determinable fair values to determine whether impairment exists in such securities, considering, among other factors, the nature of the securities, financial condition of the issuer and expected future cash flows. The Company recorded $5,000 of impairment of equity securities without readily determinable fair values for the three months ended September 30, 2022. For the nine months ended September 30, 2022, the Company recorded $4.4 million of impairment of equity securities without readily determinable fair values. The following table presents the portion of the Company’s available-for-sale investment securities portfolios that have gross unrealized losses, reflecting the length of time that individual securities have been in a continuous unrealized loss position at September 30, 2022: Continuous unrealized Continuous unrealized Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-sale securities U.S. government agencies $ 44,013 $ (5,987) $ — $ — $ 44,013 $ (5,987) Municipal 128,642 (5,960) 31,753 (1,778) 160,395 (7,738) Corporate notes: Financial issuers 20,621 (1,379) 65,422 (6,572) 86,043 (7,951) Other 990 (10) — — 990 (10) Mortgage-backed: Mortgage-backed securities 1,847,405 (308,051) 691,395 (205,927) 2,538,800 (513,978) Collateralized mortgage obligations 79,806 (19,116) — — 79,806 (19,116) Total available-for-sale securities $ 2,121,477 $ (340,503) $ 788,570 $ (214,277) $ 2,910,047 $ (554,780) The Company conducts a regular assessment of its investment securities to determine whether securities are experiencing credit losses. Factors for consideration include the nature of the securities, credit ratings or financial condition of the issuer, the extent of the unrealized loss, expected cash flows, market conditions and the Company’s ability to hold the securities through the anticipated recovery period. The Company does not consider available-for-sale securities with unrealized losses at September 30, 2022 to be experiencing credit losses and recognized no resulting allowance for credit losses for such individually assessed credit losses. The Company does not intend to sell these investments and it is more likely than not that the Company will not be required to sell these investments before recovery of the amortized cost bases, which may be the maturity dates of the securities. The unrealized losses within each category have occurred as a result of changes in interest rates, market spreads and market conditions subsequent to purchase. Available-for-sale securities with continuous unrealized losses existing for more than twelve months were primarily mortgage-backed securities with unrealized losses due to increased market rates during such period. See Note 7 - Allowance for Credit Losses for further discussion regarding any credit losses associated with held-to-maturity securities at September 30, 2022. The following table provides information as to the amount of gross gains and losses, adjustments and impairment on investment securities recognized in earnings and proceeds received through the sale or call of investment securities: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Realized gains on investment securities $ 15 $ 355 $ 280 $ 1,184 Realized losses on investment securities (4) (5) (18) (40) Net realized gains on investment securities 11 350 262 1,144 Unrealized gains on equity securities with readily determinable fair value 45 1 227 2,627 Unrealized losses on equity securities with readily determinable fair value (3,154) (634) (9,809) (1,585) Net unrealized (losses) gains on equity securities with readily determinable fair value (3,109) (633) (9,582) 1,042 Upward adjustments of equity securities without readily determinable fair values — — — — Downward adjustments of equity securities without readily determinable fair values — — — — Impairment of equity securities without readily determinable fair values (5) (2,148) (4,362) (2,178) Adjustment and impairment, net, of equity securities without readily determinable fair values (5) (2,148) (4,362) (2,178) (Losses) gains on investment securities, net $ (3,103) $ (2,431) $ (13,682) $ 8 Proceeds from sales of available-for-sale securities (1) $ — $ 189,851 $ — $ 192,227 Proceeds from sales of equity securities with readily determinable fair value 3,000 3,500 21,753 9,759 Proceeds from sales and capital distributions of equity securities without readily determinable fair value 703 1,330 1,232 2,467 (1) Includes proceeds from available-for-sale securities sold in accordance with written covered call options sold to a third party. The amortized cost and fair value of available-for-sale and held-to-maturity investment securities as of September 30, 2022, December 31, 2021 and September 30, 2021, by contractual maturity, are shown in the following table. Contractual maturities may differ from actual maturities as borrowers may have the right to call or repay obligations with or without call or prepayment penalties. Mortgage-backed securities are not included in the maturity categories in the following maturity summary as actual maturities may differ from contractual maturities because the underlying mortgages may be called or prepaid without penalties: September 30, 2022 December 31, 2021 September 30, 2021 (In thousands) Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Available-for-sale securities Due in one year or less $ 55,249 $ 54,846 $ 49,714 $ 49,822 $ 45,459 $ 45,549 Due in one to five years 86,555 83,641 72,382 73,850 92,457 94,134 Due in five to ten years 115,949 105,921 118,358 117,573 121,099 121,650 Due after ten years 68,853 60,639 69,200 72,560 67,608 71,660 Mortgage-backed 3,151,700 2,618,606 2,006,715 2,013,988 2,020,796 2,040,485 Total available-for-sale securities $ 3,478,306 $ 2,923,653 $ 2,316,369 $ 2,327,793 $ 2,347,419 $ 2,373,478 Held-to-maturity securities Due in one year or less $ 1,173 $ 1,166 $ 2,976 $ 2,992 $ 5,466 $ 5,493 Due in one to five years 85,423 78,995 79,422 79,705 75,724 76,173 Due in five to ten years 108,703 104,829 106,713 112,667 150,908 157,282 Due after ten years 348,026 272,319 222,522 221,358 186,398 186,401 Mortgage-backed 2,846,827 2,222,017 2,530,730 2,483,972 2,318,309 2,274,131 Total held-to-maturity securities $ 3,390,152 $ 2,679,326 $ 2,942,363 $ 2,900,694 $ 2,736,805 $ 2,699,480 Less: Allowance for credit losses (310) (78) (83) Held-to-maturity securities, net of allowance for credit losses $ 3,389,842 $ 2,942,285 $ 2,736,722 Securities having a carrying value of $2.5 billion at September 30, 2022 as well as securities having a carrying value of $2.6 billion and $2.5 billion at December 31, 2021 and September 30, 2021, respectively, were pledged as collateral for public deposits, trust deposits, Federal Home Loan Bank (“FHLB”) advances and available lines of credit, securities sold under repurchase agreements and derivatives. At September 30, 2022, there were no securities of a single issuer, other than U.S. government-sponsored agency securities, which exceeded 10% of shareholders’ equity.

Loans

Loans	9 Months Ended
	Sep. 30, 2022
Loans and Leases Receivable Disclosure [Abstract]
Loans	Loans The following table shows the Company’s loan portfolio by category as of the dates shown: September 30, December 31, September 30, (Dollars in thousands) 2022 2021 2021 Balance: Commercial $ 12,259,250 $ 11,904,068 $ 11,187,972 Commercial real estate 9,578,184 8,990,286 8,885,714 Home equity 328,822 335,155 347,662 Residential real estate 2,235,459 1,637,099 1,547,736 Premium finance receivables Property and casualty insurance 5,713,340 4,855,487 4,616,977 Life insurance 8,004,856 7,042,810 6,655,453 Consumer and other 47,702 24,199 22,529 Total loans, net of unearned income $ 38,167,613 $ 34,789,104 $ 33,264,043 Mix: Commercial 32 % 34 % 33 % Commercial real estate 25 26 27 Home equity 1 1 1 Residential real estate 6 5 5 Premium finance receivables Property and casualty insurance 15 14 14 Life insurance 21 20 20 Consumer and other 0 0 0 Total loans, net of unearned income 100 % 100 % 100 % The Company’s loan portfolio is generally comprised of loans to consumers and small to medium-sized businesses, which, for the commercial and commercial real estate portfolios, are located primarily within the geographic market areas that the banks serve. Various niche lending businesses, including lease finance and franchise lending, operate on a national level. Additionally, to provide short-term relief due to macroeconomic deterioration from the COVID-19 pandemic to small businesses within such market areas, the Company originated loans through the Paycheck Protection Program (“PPP”), an expansion of guaranteed lending under Section 7(a) of the Small Business Act within the CARES Act. As of September 30, 2022, the Company’s commercial portfolio included approximately $43.7 million of such PPP loans. The premium finance receivables portfolios are made to customers throughout the United States and Canada. The Company strives to maintain a loan portfolio that is diverse in terms of loan type, industry, borrower and geographic concentrations. Such diversification reduces the exposure to economic downturns that may occur in different segments of the economy or in different industries. Certain premium finance receivables are recorded net of unearned income. The unearned income portions of such premium finance receivables were $180.1 million at September 30, 2022, $135.5 million at December 31, 2021 and $124.0 million at September 30, 2021. Total loans, excluding purchased credit deteriorated (“PCD”) loans, include net deferred loan fees and costs and fair value purchase accounting adjustments totaling $73.1 million at September 30, 2022, $50.8 million at December 31, 2021 and $13.1 million at September 30, 2021. Net deferred fees as of September 30, 2022 includes $1.7 million of net deferred fees paid by the Small Business Administration (“SBA”) for loans originated under the PPP. As PPP loans share similar characteristics (loan terms), and prepayments are considered probable and can reasonably be estimated due to the terms of the program, the Company considers estimated future principal prepayments in recognizing such deferred fees for determining a constant effective yield on the portfolio of loans. It is the policy of the Company to review each prospective credit in order to determine the appropriateness and, when required, the adequacy of security or collateral necessary to obtain when making a loan. The type of collateral, when required, will vary from liquid assets to real estate. The Company seeks to ensure access to collateral, in the event of default, through adherence to state lending laws and the Company’s credit monitoring procedures. Acquired Loan Information — PCD Loans As part of the Company’s prior acquisitions, the Company acquired loans that were classified as PCD based upon various factors as of the acquisition date, including internal risk rating methodologies and prior classification as a TDR. The following table provides estimated details as of the date of acquisition on PCD loans acquired in 2021: (In thousands) Insurance Agency Loan Portfolio Contractually required payments (unpaid principal balance) $ 13,882 Allowance for credit losses (1) (2,806) Discount, net of any premium (214) Purchase price of PCD loans acquired $ 10,862 (1) The initial allowance for credit losses on PCD loans acquired during 2021 measured approximately $2.8 million, of which $2.3 million was charged off related to PCD loans that met the Company’s charge-off policy at the time of acquisition. After considering these loans that were immediately charged off, the net impact of PCD allowance for credit losses at the acquisition date was approximately $470,000 .

Allowance for Credit Losses

Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2022
Credit Loss [Abstract]
Allowance for Credit Losses	Allowance for Credit Losses In accordance with ASC 326, the Company is required to measure the allowance for credit losses of financial assets with similar risk characteristics on a collective or pooled basis. In considering the segmentation of financial assets measured at amortized cost into pools, the Company considered various risk characteristics in its analysis. Generally, the segmentation utilized represents the level at which the Company develops and documents its systematic methodology to determine the allowance for credit losses for the financial assets held at amortized cost, specifically the Company's loan portfolio and debt securities classified as held-to-maturity. Below is a summary of the Company's loan portfolio segments and major debt security types: Commercial loans, including PPP loans: The Company makes commercial loans for many purposes, including working capital lines and leasing arrangements, that are generally renewable annually and supported by business assets, personal guarantees and additional collateral. Underlying collateral includes receivables, inventory, enterprise value and the assets of the business. Commercial business lending is generally considered to involve a slightly higher degree of risk than traditional consumer bank lending. This portfolio includes a range of industries, including manufacturing, restaurants, franchise, professional services, equipment finance and leasing, mortgage warehouse lending and industrial. Individually assessed collateral dependent commercial loans are primarily collateralized by equipment and the enterprise value or assets of the specific business. The Company also originated loans through the PPP. Administered by the SBA, the PPP provided short-term relief primarily related to the disruption from COVID-19 to companies and non-profits that meet the SBA’s definition of an eligible small business. Under the program, the SBA will forgive all or a portion of the loan if, during a certain period, loans were used for qualifying expenses. If all or a portion of the loan was not forgiven, the borrower is responsible for repayment. PPP loans are fully guaranteed by the SBA, including any portion not forgiven. The SBA guarantee existed at the inception of the loan and throughout its life and is not separated from the loan if the loan is subsequently sold or transferred. As it is not considered a freestanding contract, the Company considers the impact of the SBA guarantee when measuring the allowance for credit losses. Commercial real estate loans, including construction and development, and non-construction: The Company's commercial real estate loans are generally secured by a first mortgage lien and assignment of rents on the underlying property (utilized in related assessment of individually assessed collateral dependent loans). Since most of the Company's bank branches are located in the Chicago metropolitan area and southern Wisconsin, a significant portion of the Company's commercial real estate loan portfolio is located in this region. As the risks and circumstances of such loans in construction phase vary from that of non-construction commercial real estate loans, the Company assesses the allowance for credit losses separately for these two segments. Home equity loans: The Company's home equity loans and lines of credit are primarily originated by each of the bank subsidiaries in their local markets where there is a strong understanding of the underlying real estate value. The Company's banks monitor and manage these loans, and conduct an automated review of all home equity lines of credit at least twice per year. The bank’s subsidiaries use this information to manage loans that may be higher risk and to determine whether to obtain additional credit information or updated property valuations. In a limited number of cases, the Company may issue home equity credit together with first mortgage financing, and requests for such financing are evaluated on a combined basis. Residential real estate loans, including early buy-out loans guaranteed by U.S. government agencies: The Company's residential real estate portfolio includes one- to four-family adjustable rate mortgages that have repricing terms generally over five years, construction loans to individuals and bridge financing loans for qualifying customers, as well as certain long-term fixed rate loans. The Company's residential mortgages relate to properties located principally in the Chicago metropolitan area and southern Wisconsin or vacation homes owned by local residents. Due to interest rate risk considerations, the Company generally sells in the secondary market loans originated with long-term fixed rates, however, certain of these loans may be retained within the banks’ own loan portfolios where they are non-agency conforming, or where the terms of the loans make them favorable to retain. The Company believes that since this loan portfolio consists primarily of locally-originated loans, and since the majority of the borrowers are longer-term customers with lower LTV ratios, the Company faces a relatively low risk of borrower default and delinquency. Collateral dependent residential real estate loans that are individually assessed when measuring the allowance for credit losses are primarily collateralized by such one-to-four family properties noted above. It is not the Company's current practice to underwrite, and there are no plans to underwrite subprime, Alt A, no or little documentation loans, or option ARM loans. Additionally, early buy-out loans guaranteed by U.S. government agencies include loans in which the Company is eligible or has exercised its option under the Government National Mortgage Association (“GNMA”) securitization program to repurchase certain delinquent mortgage loans. Such loans were previously transferred by the Company with servicing of such loans retained. Early buy-out loans are insured or guaranteed by the Federal Housing Administration (“FHA”) or the U.S. Department of Veterans Affairs, subject to indemnifications and insurance limits for certain loans. Premium finance receivables: The Company makes loans to businesses to finance the insurance premiums they pay on their property and casualty insurance policies. The loans are indirectly originated by working through independent medium and large insurance agents and brokers located throughout the United States and Canada. The insurance premiums financed are primarily for commercial customers’ purchases of liability, property and casualty and other commercial insurance. This lending involves relatively rapid turnover of the loan portfolio and high volume of loan originations. The Company performs ongoing credit and other reviews of the agents and brokers to mitigate against the risk of fraud. The Company also originates life insurance premium finance receivables. These loans are originated directly with the borrowers with assistance from life insurance carriers, independent insurance agents, financial advisors and legal counsel. The life insurance policy is the primary form of collateral. In addition, these loans often are secured with a letter of credit, marketable securities or certificates of deposit. In some cases, the Company may make a loan that has a partially unsecured position. Consumer and other loans: Included in the consumer and other loan category is a wide variety of personal and consumer loans to individuals. The Company originates consumer loans in order to provide a wider range of financial services to its customers. Consumer loans generally have shorter terms and higher interest rates than mortgage loans, but generally involve more credit risk than mortgage loans due to the type and nature of the collateral. U.S. government agency securities: This security type includes debt obligations of certain government-sponsored entities of the U.S. government such as the Federal Home Loan Bank, Federal Agricultural Mortgage Corporation, Federal Farm Credit Banks Funding Corporation and Fannie Mae. Such securities often contain an explicit or implicit guarantee of the U.S. government. Municipal securities: The Company's municipal securities portfolio includes bond issuances for various municipal government entities located throughout the United States, including the Chicago metropolitan area and southern Wisconsin, some of which are privately placed and non-rated. Though the risk of loss is typically low, including the Company’s own past loss experience with similar investments, default history exists on municipal securities within the United States. Mortgage-backed securities: This security type includes debt obligations supported by pools of individual mortgage loans and issued by certain government-sponsored entities of the U.S. government such as Freddie Mac and Fannie Mae. Such securities are considered to contain an implicit guarantee of the U.S. government. Corporate notes: The Company's corporate notes portfolio includes bond issues for various public companies representing a diversified population of industries. The risk of loss in this portfolio is considered low based on the characteristics of the investments, including the Company’s own past history with similar investments. In accordance with ASC 326, the Company elected to not measure an allowance for credit losses on accrued interest. As such accrued interest is written off in a timely manner when deemed uncollectible. Any such write-off of accrued interest will reverse previously recognized interest income. In addition, the Company elected to not include accrued interest within presentation and disclosures of the carrying amount of financial assets held at amortized cost. This election is applicable to the various disclosures included within the Company's financial statements. Accrued interest related to financial assets held at amortized cost is included within accrued interest receivable and other assets within the Company's Consolidated Statements of The tables below show the aging of the Company’s loan portfolio by the segmentation noted above at September 30, 2022, December 31, 2021 and September 30, 2021: As of September 30, 2022 90+ days and still accruing 60-89 days past due 30-59 days past due (In thousands) Nonaccrual Current Total Loans Loan Balances (includes PCD): Commercial Commercial, industrial and other, excluding PPP loans $ 44,293 $ 237 $ 23,209 $ 31,640 $ 12,116,213 $ 12,215,592 Commercial PPP loans — — 1,432 3,277 38,949 43,658 Commercial real estate Construction and development 889 — — 5,715 1,518,907 1,525,511 Non-construction 9,588 — 6,041 24,256 8,012,788 8,052,673 Home equity 1,320 — 125 848 326,529 328,822 Residential real estate, excluding early buy-out loans 9,787 — 2,149 15 2,074,844 2,086,795 Premium finance receivables Property and casualty insurance loans 13,026 16,624 15,301 21,128 5,647,261 5,713,340 Life insurance loans — 1,831 13,628 44,954 7,944,443 8,004,856 Consumer and other 7 31 26 343 47,295 47,702 Total loans, net of unearned income, excluding early buy-out loans $ 78,910 $ 18,723 $ 61,911 $ 132,176 $ 37,727,229 $ 38,018,949 Early buy-out loans guaranteed by U.S. government agencies (1) 24,020 68,067 489 104 55,984 148,664 Total loans, net of unearned income $ 102,930 $ 86,790 $ 62,400 $ 132,280 $ 37,783,213 $ 38,167,613 As of December 31, 2021 90+ days and still accruing 60-89 days past due 30-59 days past due (In thousands) Nonaccrual Current Total Loans Loan Balances (includes PCD): Commercial Commercial, industrial and other, excluding PPP loans $ 20,399 $ — $ 23,492 $ 42,933 $ 11,258,961 $ 11,345,785 Commercial PPP loans — 15 770 928 556,570 558,283 Commercial real estate Construction and development 1,377 — — 2,809 1,352,018 1,356,204 Non-construction 20,369 — 284 37,634 7,575,795 7,634,082 Home equity 2,574 — — 1,120 331,461 335,155 Residential real estate, excluding early buy-out loans 16,440 — 982 12,145 1,576,704 1,606,271 Premium finance receivables Property and casualty insurance loans 5,433 7,210 15,490 22,419 4,804,935 4,855,487 Life insurance loans — 7 12,614 66,651 6,963,538 7,042,810 Consumer and other 477 137 34 509 23,042 24,199 Total loans, net of unearned income, excluding early buy-out loans $ 67,069 $ 7,369 $ 53,666 $ 187,148 $ 34,443,024 $ 34,758,276 Early buy-out loans guaranteed by U.S. government agencies (1) — — — 275 30,553 30,828 Total loans, net of unearned income $ 67,069 $ 7,369 $ 53,666 $ 187,423 $ 34,473,577 $ 34,789,104 As of September 30, 2021 90+ days and still accruing 60-89 days past due 30-59 days past due (In thousands) Nonaccrual Current Total Loans Loan Balances (includes PCD): Commercial Commercial, industrial and other, excluding PPP loans $ 26,468 $ — $ 9,768 $ 24,086 $ 10,045,662 $ 10,105,984 Commercial PPP loans — — — 1,138 1,080,850 1,081,988 Commercial real estate Construction and development 1,030 — — 12,631 1,330,054 1,343,715 Non-construction 22,676 — 5,395 67,187 7,446,741 7,541,999 Home equity 3,449 164 340 867 342,842 347,662 Residential real estate, excluding early buy-out loans 22,633 — 1,540 1,076 1,495,501 1,520,750 Premium finance receivables Property and casualty insurance loans 7,300 5,811 10,642 14,614 4,578,610 4,616,977 Life insurance loans — — 5,162 7,040 6,643,251 6,655,453 Consumer and other 384 126 16 125 21,878 22,529 Total loans, net of unearned income, excluding early buy-out loans $ 83,940 $ 6,101 $ 32,863 $ 128,764 $ 32,985,389 $ 33,237,057 Early buy-out loans guaranteed by U.S. government agencies (1) — — — — 26,986 26,986 Total loans, net of unearned income $ 83,940 $ 6,101 $ 32,863 $ 128,764 $ 33,012,375 $ 33,264,043 (1) Early buy-out loans are insured or guaranteed by the FHA or the U.S. Department of Veterans Affairs, subject to indemnifications and insurance limits for certain loans. Credit Quality Indicators Credit quality indicators, specifically the Company's internal risk rating systems, reflect how the Company monitors credit losses and represents factors used by the Company when measuring the allowance for credit losses. The following discusses the Company's credit quality indicators by financial asset. Loan portfolios The Company's ability to manage credit risk depends in large part on its ability to properly identify and manage problem loans. To do so, the Company operates a credit risk rating system under which credit management personnel assign a credit risk rating (1 to 10 rating) to each loan at the time of origination and review loans on a regular basis. For loans measured at amortized cost (or excluding loans measured at fair value, such as early buy-out loans guaranteed by U.S. government agencies), these credit risk ratings are also an important aspect of the Company's allowance for credit losses measurement methodology. The credit risk rating structure and classifications are shown below: Pass (risk rating 1 to 5): Based on various factors (liquidity, leverage, etc.), the Company believes asset quality is acceptable and is deemed to not require additional monitoring by the Company. Special mention (risk rating 6): Assets in this category are currently protected, and potentially weak, but not to the point of substandard classification. Loss potential is moderate if corrective action is not taken. Substandard accrual (risk rating 7): Assets in this category have well defined weaknesses that jeopardize the liquidation of the debt. Loss potential is distinct but with no discernible impairment. Substandard nonaccrual/doubtful (risk rating 8 and 9): Assets have all the weaknesses in those classified “substandard accrual” with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of current existing facts, conditions, and values, improbable. Loss/fully charged-off (risk rating 10): Assets in this category are considered fully uncollectible. As such, these assets have no carrying balance on the Company's Consolidated Statements of Condition. Early buy-out loans guaranteed by U.S. government agencies: As noted above, such loans are measured at fair value and thus excluded from the measurement of the allowance for credit losses. Credit risk ratings assigned to such loans are considered in the measurement of fair value as well as related guarantees provided by the FHA or the U.S. Department of Veterans Affairs, subject to indemnifications and insurance limits for certain loans. Generally, each loan officer is responsible for monitoring his or her loan portfolio, recommending a credit risk rating for each loan in his or her portfolio and ensuring the credit risk ratings are appropriate. These credit risk ratings are then ratified by the bank’s chief credit officer and/or concurrence credit officer. Credit risk ratings are determined by evaluating a number of factors including: a borrower’s financial strength, cash flow coverage, collateral protection and guarantees. The Company’s Problem Loan Reporting system includes all such loans described above with credit risk ratings of 6 through 9. This system is designed to provide an ongoing detailed tracking mechanism for each problem loan. Once management determines that a loan has deteriorated to a point where it has a credit risk rating of 6 or worse, the Company’s Managed Asset Division performs an overall credit and collateral review. As part of this review, all underlying collateral is identified and the valuation methodology is analyzed and tracked. As a result of this initial review by the Company’s Managed Asset Division, the credit risk rating is reviewed and a portion of the outstanding loan balance may be deemed uncollectible and, as a result, no longer share similar risk characteristics as its related pool. If that is the case, the individual loan is considered collateral dependent and individually assessed for an allowance for credit loss. The Company’s individual assessment utilizes an independent re-appraisal of the collateral (unless such a third-party evaluation is not possible due to the unique nature of the collateral, such as a closely-held business or thinly traded securities). In the case of commercial real estate collateral, an independent third party appraisal is ordered by the Company’s Real Estate Services Group to determine if there has been any change in the underlying collateral value. These independent appraisals are reviewed by the Real Estate Services Group and sometimes by independent third party valuation experts and may be adjusted depending upon market conditions. Through the credit risk rating process, such loans are reviewed to determine if they are performing in accordance with the original contractual terms. If the borrower has failed to comply with the original contractual terms, further action may be required by the Company, including a downgrade in the credit risk rating, movement to nonaccrual status or a charge-off. If the Company determines that a loan amount or portion thereof is uncollectible, the loan’s credit risk rating is immediately downgraded to an 8 or 9 and the uncollectible amount is charged-off. Any loan that has a partial charge-off continues to be assigned a credit risk rating of an 8 or 9 for the duration of time that a balance remains outstanding. The Company undertakes a thorough and ongoing analysis to determine if additional impairment and/or charge-offs are appropriate and to begin a workout plan for the credit to minimize actual losses. In determining the appropriate charge-off for collateral-dependent loans, the Company considers the results of appraisals for the associated collateral. The table below shows the Company’s loan portfolio by credit quality indicator and year of origination at September 30, 2022: Year of Origination Revolving Total (In thousands) 2022 2021 2020 2019 2018 Prior Revolving to Term Loans Loan Balances: Commercial, industrial and other Pass $ 1,871,088 $ 2,485,791 $ 1,166,137 $ 695,054 $ 517,699 $ 899,602 $ 4,088,668 $ 46,525 $ 11,770,564 Special mention 17,507 47,497 10,996 40,081 39,599 15,177 99,424 90 270,371 Substandard accrual 1,783 41,724 25,692 12,938 6,837 3,681 37,709 — 130,364 Substandard nonaccrual/doubtful 125 370 4,035 29,497 1,224 5,158 3,813 71 44,293 Total commercial, industrial and other $ 1,890,503 $ 2,575,382 $ 1,206,860 $ 777,570 $ 565,359 $ 923,618 $ 4,229,614 $ 46,686 $ 12,215,592 Commercial PPP Pass $ — $ 30,126 $ 7,963 $ — $ — $ — $ — $ — $ 38,089 Special mention — 2,484 289 — — — — — 2,773 Substandard accrual — 2,324 472 — — — — — 2,796 Substandard nonaccrual/doubtful — — — — — — — — — Total commercial PPP $ — $ 34,934 $ 8,724 $ — $ — $ — $ — $ — $ 43,658 Construction and development Pass $ 272,843 $ 490,456 $ 380,020 $ 172,107 $ 37,778 $ 99,876 $ 14,783 $ — $ 1,467,863 Special mention — — 12,647 3,554 19,460 84 — — 35,745 Substandard accrual — — 8,407 — — 12,607 — — 21,014 Substandard nonaccrual/doubtful — — — — — 889 — — 889 Total construction and development $ 272,843 $ 490,456 $ 401,074 $ 175,661 $ 57,238 $ 113,456 $ 14,783 $ — $ 1,525,511 Non-construction Pass $ 1,340,763 $ 1,521,514 $ 1,037,513 $ 883,456 $ 621,687 $ 2,243,859 $ 153,330 $ 5,325 $ 7,807,447 Special mention 4,349 3,954 6,408 15,119 41,036 80,760 — — 151,626 Substandard accrual — — 836 14,286 26,236 42,654 — — 84,012 Substandard nonaccrual/doubtful — — — — 114 9,474 — — 9,588 Total non-construction $ 1,345,112 $ 1,525,468 $ 1,044,757 $ 912,861 $ 689,073 $ 2,376,747 $ 153,330 $ 5,325 $ 8,052,673 Home equity Pass $ — $ — $ — $ 56 $ — $ 5,122 $ 307,969 $ — $ 313,147 Special mention — — — — 237 100 3,785 — 4,122 Substandard accrual — — — — — 8,520 793 920 10,233 Substandard nonaccrual/doubtful — — — 18 — 1,302 — — 1,320 Total home equity $ — $ — $ — $ 74 $ 237 $ 15,044 $ 312,547 $ 920 $ 328,822 Residential real estate Early buy-out loans guaranteed by U.S. government agencies $ — $ 1,365 $ 10,109 $ 24,173 $ 21,038 $ 91,979 $ — $ — $ 148,664 Pass 654,064 838,127 231,989 123,610 52,724 156,557 — — 2,057,071 Special mention 1,275 2,454 166 966 1,399 5,068 — — 11,328 Substandard accrual 679 524 2,903 — 319 4,184 — — 8,609 Substandard nonaccrual/doubtful 113 362 781 2,210 406 5,915 — — 9,787 Total residential real estate $ 656,131 $ 842,832 $ 245,948 $ 150,959 $ 75,886 $ 263,703 $ — $ — $ 2,235,459 Premium finance receivables - property and casualty Pass $ 5,416,268 $ 172,151 $ 9,279 $ 2,651 $ 53 $ — $ — $ — $ 5,600,402 Special mention 92,043 3,822 84 — — — — — 95,949 Substandard accrual 1,033 2,890 40 — — — — — 3,963 Substandard nonaccrual/doubtful 9,206 3,814 6 — — — — — 13,026 Total premium finance receivables - property and casualty $ 5,518,550 $ 182,677 $ 9,409 $ 2,651 $ 53 $ — $ — $ — $ 5,713,340 Premium finance receivables - life Pass $ 389,968 $ 717,377 $ 1,030,974 $ 900,998 $ 751,341 $ 4,214,198 $ — $ — $ 8,004,856 Special mention — — — — — — — — — Substandard accrual — — — — — — — — — Substandard nonaccrual/doubtful — — — — — — — — — Total premium finance receivables - life $ 389,968 $ 717,377 $ 1,030,974 $ 900,998 $ 751,341 $ 4,214,198 $ — $ — $ 8,004,856 Consumer and other Pass $ 2,179 $ 1,822 $ 438 $ 539 $ 390 $ 9,029 $ 33,084 $ — $ 47,481 Special mention — 6 — 4 — 115 4 — 129 Substandard accrual — 4 1 — — 71 9 — 85 Substandard nonaccrual/doubtful — 6 — 1 — — — — 7 Total consumer and other $ 2,179 $ 1,838 $ 439 $ 544 $ 390 $ 9,215 $ 33,097 $ — $ 47,702 Total loans Early buy-out loans guaranteed by U.S. government agencies $ — $ 1,365 $ 10,109 $ 24,173 $ 21,038 $ 91,979 $ — $ — $ 148,664 Pass 9,947,173 6,257,364 3,864,313 2,778,471 1,981,672 7,628,243 4,597,834 51,850 37,106,920 Special mention 115,174 60,217 30,590 59,724 101,731 101,304 103,213 90 572,043 Substandard accrual 3,495 47,466 38,351 27,224 33,392 71,717 38,511 920 261,076 Substandard nonaccrual/doubtful 9,444 4,552 4,822 31,726 1,744 22,738 3,813 71 78,910 Total loans $ 10,075,286 $ 6,370,964 $ 3,948,185 $ 2,921,318 $ 2,139,577 $ 7,915,981 $ 4,743,371 $ 52,931 $ 38,167,613 Held-to-maturity debt securities The Company conducts an assessment of its investment securities, including those classified as held-to-maturity, at the time of purchase and on at least an annual basis to ensure such investment securities remain within appropriate levels of risk and continue to perform satisfactorily in fulfilling its obligations. The Company considers, among other factors, the nature of the securities and credit ratings or financial condition of the issuer. If available, the Company obtains a credit rating for issuers from a Nationally Recognized Statistical Rating Organization (“NRSRO”) for consideration. If no such rating is available for an issuer, the Company performs an internal rating based on the scale utilized within the loan portfolio as discussed above. For purposes of the table below, the Company has converted any issuer rating from an NRSRO into the Company’s internal ratings based on Investment Policy and review by the Company’s management. As of September 30, 2022 Year of Origination Total (In thousands) 2022 2021 2020 2019 2018 Prior Balance Amortized Cost Balances: U.S. government agencies 1-4 internal grade $ 135,000 $ 147,799 $ 25,000 $ 4,000 $ — $ 2,819 $ 314,618 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total U.S. government agencies $ 135,000 $ 147,799 $ 25,000 $ 4,000 $ — $ 2,819 $ 314,618 Municipal 1-4 internal grade $ — $ 7,023 $ 275 $ 160 $ 7,423 $ 165,423 $ 180,304 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total municipal $ — $ 7,023 $ 275 $ 160 $ 7,423 $ 165,423 $ 180,304 Mortgage-backed securities 1-4 internal grade $ 369,719 $ 2,477,108 $ — $ — $ — $ — $ 2,846,827 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total mortgage-backed securities $ 369,719 $ 2,477,108 $ — $ — $ — $ — $ 2,846,827 Corporate notes 1-4 internal grade $ 4,962 $ — $ 6,010 $ 7,334 $ 3,203 $ 26,894 $ 48,403 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total corporate notes $ 4,962 $ — $ 6,010 $ 7,334 $ 3,203 $ 26,894 $ 48,403 Total held-to-maturity securities $ 3,390,152 Less: Allowance for credit losses (310) Held-to-maturity securities, net of allowance for credit losses $ 3,389,842 Measurement of Allowance for Credit Losses The Company's allowance for credit losses consists of the allowance for loan losses, the allowance for unfunded commitment losses and the allowance for held-to-maturity debt security losses. In accordance with ASC 326, the Company measures the allowance for credit losses at the time of origination or purchase of a financial asset, representing an estimate of lifetime expected credit losses on the related asset. When developing its estimate, the Company considers available information relevant to assessing the collectability of cash flows, from both internal and external sources. Historical credit loss experience is one input in the estimation process as well as inputs relevant to current conditions and reasonable and supportable forecasts. In considering past events, the Company considers the relevance, or lack thereof, of historical information due to changes in such things as financial asset underwriting or collection practices, and changes in portfolio mix due to changing business plans and strategies. In considering current conditions and forecasts, the Company considers both the current economic environment and the forecasted direction of the economic environment with emphasis on those factors deemed relevant to or driving changes in expected credit losses. As significant judgment is required, the review of the appropriateness of the allowance for credit losses is performed quarterly by various committees with participation by the Company's executive management. September 30, December 31, September 30, (In thousands) 2022 2021 2021 Allowance for loan losses $ 246,110 $ 247,835 $ 248,612 Allowance for unfunded lending-related commitments losses 68,918 51,818 47,443 Allowance for loan losses and unfunded lending-related commitments losses 315,028 299,653 296,055 Allowance for held-to-maturity securities losses 310 78 83 Allowance for credit losses $ 315,338 $ 299,731 $ 296,138 The allowance for credit losses is measured on a collective or pooled basis when similar risk characteristics exist, based upon the segmentation discussed above. The Company utilizes modeling methodologies that estimate lifetime credit loss rates on each pool, including methodologies estimating the probability of default and loss given default on specific segments. Historical credit loss history is adjusted for reasonable and supportable forecasts developed by the Company on a quantitative or qualitative basis and incorporates third party economic forecasts. Reasonable and supportable forecasts consider the macroeconomic factors that are most relevant to evaluating and predicting expected credit losses in the Company's financial assets. Currently, the Company utilizes an eight quarter forecast period using a single macroeconomic scenario provided by a third party and reviewed within the Company's governance structure. For periods beyond the ability to develop reasonable and supportable forecasts, the Company reverts to historical loss rates at an input level, straight-line over a four quarter reversion period. Expected credit losses are measured over the contractual term of the financial asset with consideration of expected prepayments. Expected extensions, renewals or modifications of the financial asset are only considered when either 1) the expected extension, renewal or modification is contained within the existing agreement and is not unconditionally cancelable, or 2) the expected extension, renewal or modification is reasonably expected to result in a TDR. The methodologies discussed above are applied to both current asset balances on the Company's Consolidated Statements of Condition and off-balance sheet commitments (i.e. unfunded lending-related commitments). Assets that do not share similar risk characteristics with a pool are assessed for the allowance for credit losses on an individual basis. These typically include assets experiencing financial difficulties, including assets rated as substandard nonaccrual and doubtful as well as assets currently classified or expected to be classified as TDRs. If foreclosure is probable or the asset is considered collateral-dependent, expected credit losses are measured based upon the fair value of the underlying collateral adjusted for selling costs, if appropriate. Underlying collateral across the Company's segments consist primarily of real estate, land and construction assets as well as general business assets of the borrower. As of September 30, 2022, excluding loans carried at fair value, substandard nonaccrual loans totaling $32.0 million in carrying balance had no related allowance for credit losses. For certain accruing current and expected TDRs, expected credit losses are measured based upon the present value of future cash flows of the modified asset terms compared to the amortized cost of the asset. Loans identified as being reasonably expected to be modified into TDRs in the future totaled $8.4 million as of September 30, 2022. The Company does not measure an allowance for credit losses on accrued interest receivable balances because these balances are written off in a timely manner as a reduction to interest income when assets are placed on nonaccrual status. Loan portfolios A summary of activity in the allowance for credit losses, specifically for the loan portfolio (i.e. allowance for loan losses and allowance for unfunded commitment losses), for the three and nine months ended September 30, 2022 and 2021 is as follows. Three months ended September 30, 2022 Commercial Real Estate Home Equity Residential Real Estate Premium Finance Receivables Consumer and Other Total Loans (In thousands) Commercial Allowance for credit losses at beginning of period $ 142,919 $ 143,732 $ 6,990 $ 10,479 $ 7,502 $ 487 $ 312,109 Other adjustments — — — — (105) — (105) Charge-offs (780) (24) (43) (5) (6,037) (635) (7,524) Recoveries 2,523 55 38 60 1,648 31 4,355 Provision for credit losses (9,346) 6,955 70 489 7,424 601 6,193 Allowance for credit losses at period end $ 135,316 $ 150,718 $ 7,055 $ 11,023 $ 10,432 $ 484 $ 315,028 By measurement method: Individually measured $ 8,866 $ 378 $ 71 $ 727 $ — $ 1 $ 10,043 Collectively measured 126,450 150,340 6,984 10,296 10,432 483 304,985 Loans at period end Individually measured $ 46,547 $ 27,882 $ 11,421 $ 19,440 $ — $ 75 $ 105,365 Collectively measured 12,212,703 9,550,302 317,401 2,059,126 13,718,196 47,627 37,905,355 Loans held at fair value — — — 156,893 — — 156,893 Three months ended September 30, 2021 Commercial Commercial Real

Goodwill and Other Acquisition-

Goodwill and Other Acquisition-Related Intangible Assets	9 Months Ended
	Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Acquisition-Related Intangible Assets	Goodwill and Other Acquisition-Related Intangible Assets A summary of the Company’s goodwill assets by reporting unit is presented in the following table: (In thousands) December 31, 2021 Goodwill Impairment Goodwill Adjustments September 30, Community banking $ 545,671 $ — $ — $ — $ 545,671 Specialty finance 40,105 — — (2,070) 38,035 Wealth management 69,373 — — — 69,373 Total $ 655,149 $ — $ — $ (2,070) $ 653,079 The specialty finance unit’s goodwill decreased $2.1 million in the first nine months of 2022 as a result of foreign currency translation adjustments related to the Canadian acquisitions. The Company assesses each reporting unit’s goodwill for impairment on at least an annual basis and considers potential indicators of impairment at each reporting date between annual goodwill impairment tests. At October 1, 2021, the Company utilized a quantitative approach for its annual goodwill impairment tests of the banking, specialty finance and wealth management reporting units and determined that no impairment existed at that time. At each reporting date between annual goodwill impairment tests, the Company considers potential indicators of impairment. Given the current and prior economic uncertainty and volatility surrounding the effects of COVID-19, the Company assessed whether such events and circumstances resulted in it being more likely than not that the fair value of any reporting unit was less than its carrying value. Potential impairment indicators considered include the condition of the economy and banking industry; government intervention and regulatory updates; the impact of recent events to financial performance and cost factors of the reporting units; performance of the Company’s stock and other relevant events. At the conclusion of this assessment of all reporting units, the Company determined that as of September 30, 2022, it was more likely than not that the fair value of all reporting units exceeded the respective carrying value of such reporting unit. A summary of acquisition-related intangible assets as of the dates shown and the expected amortization of finite-lived acquisition-related intangible assets as of September 30, 2022 is as follows: (In thousands) September 30, December 31, September 30, Community banking segment: Core deposit intangibles with finite lives: Gross carrying amount $ 55,206 $ 55,206 $ 55,206 Accumulated amortization (41,480) (38,067) (36,840) Net carrying amount $ 13,726 $ 17,139 $ 18,366 Trademark with indefinite lives: Carrying amount 5,800 5,800 5,800 Total net carrying amount $ 19,526 $ 22,939 $ 24,166 Specialty finance segment: Customer list intangibles with finite lives: Gross carrying amount $ 1,960 $ 1,967 $ 1,967 Accumulated amortization (1,771) (1,721) (1,705) Net carrying amount $ 189 $ 246 $ 262 Wealth management segment: Customer list and other intangibles with finite lives: Gross carrying amount $ 20,430 $ 20,430 $ 20,430 Accumulated amortization (16,525) (15,308) (14,740) Net carrying amount $ 3,905 $ 5,122 $ 5,690 Total acquisition-related intangible assets: Gross carrying amount $ 83,396 $ 83,403 $ 83,403 Accumulated amortization (59,776) (55,096) (53,285) Total other acquisition-related intangible assets, net $ 23,620 $ 28,307 $ 30,118 Estimated amortization Actual in nine months ended September 30, 2022 $ 4,680 Estimated remaining in 2022 1,431 Estimated—2023 4,658 Estimated—2024 3,259 Estimated—2025 2,552 Estimated—2026 1,954 The core deposit intangibles recognized in connection with prior bank acquisitions are amortized over a ten-year period on an accelerated basis. The customer list intangibles recognized in connection with the purchase of life insurance premium finance assets in 2009 are being amortized over an 18-year period on an accelerated basis. The customer list and other intangibles recognized in connection with prior acquisitions within the wealth management segment are being amortized over a period of up to ten years on a straight-line basis. Indefinite-lived intangible assets consist of certain trade and domain names recognized in connection with the acquisition of certain assets of Veterans First Mortgage in 2018. As indefinite-lived intangible assets are not amortized, the Company assesses impairment on at least an annual basis. Total amortization expense associated with finite-lived acquisition-related intangibles totaled approximately $4.7 million and $5.9 million for the nine months ended September 30, 2022 and 2021, respectively.

Mortgage Servicing Rights ("MSR

Mortgage Servicing Rights ("MSRs")	9 Months Ended
	Sep. 30, 2022
Disclosures Pertaining to Servicing Assets and Servicing Liabilities [Abstract]
Mortgage Servicing Rights (MSRs)	Mortgage Servicing Rights (“MSRs”) The following is a summary of the changes in the carrying value of MSRs, accounted for at fair value, for the periods indicated: Three Months Ended Nine Months Ended September 30, September 30, September 30, September 30, (In thousands) 2022 2021 2022 2021 Fair value at beginning of the period $ 212,664 $ 127,604 $ 147,571 $ 92,081 Additions from loans sold with servicing retained 13,260 15,546 38,871 57,674 Estimate of changes in fair value due to: Early buyout options (“EBO”) exercised — (116) (176) (518) Payoffs and paydowns (6,041) (8,594) (18,895) (27,302) Changes in valuation inputs or assumptions 9,788 (888) 62,300 11,617 Fair value at end of the period $ 229,671 $ 133,552 $ 229,671 $ 133,552 Unpaid principal balance of mortgage loans serviced for others $ 13,925,755 $ 12,720,126 The Company recognizes MSR assets upon the sale of residential real estate loans to external third parties when it retains the obligation to service the loans and the servicing fee is more than adequate compensation. The initial recognition of MSR assets from loans sold with servicing retained and subsequent changes in fair value of all MSRs are recognized in mortgage banking revenue. MSRs are subject to changes in value from actual and expected prepayment of the underlying loans. The estimation of fair value related to MSRs is partly impacted by the Company exercising its EBO on eligible loans previously sold to the Government National Mortgage Association (“GNMA”). Under such optional repurchase program, financial institutions acting as servicers are allowed to buy back from the securitized loan pool individual delinquent mortgage loans meeting certain criteria for which the institution was the original transferor of such loans. At the option of the servicer and without prior authorization from GNMA, the servicer may repurchase such delinquent loans for an amount equal to the remaining principal balance of the loan. At the time of such repurchase, any MSR value related to such loans is derecognized. The MSR asset fair value is determined by using a discounted cash flow model that incorporates the objective characteristics of the portfolio as well as subjective valuation parameters that purchasers of servicing would apply to such portfolios sold into the secondary market. The subjective factors include loan prepayment speeds, discount rates, servicing costs and other economic factors. The Company uses a third party to assist in the valuation of MSRs. Periodically, the Company will purchase options for the right to purchase securities not currently held within the banks’ investment portfolios or enter into interest rate swaps in which the Company elects to not designate such derivatives as hedging instruments. These option and swap transactions are designed primarily to economically hedge a portion of the fair value adjustments related to the Company’s MSRs. The gain or loss associated with these derivative contracts is included in mortgage banking revenue. For more information regarding these hedges outstanding as of September 30, 2022, see Note 15 - Derivative Financial Instruments in Item 1 of this report. There were no such options or swaps outstanding as of September 30, 2021.

Deposits

Deposits	9 Months Ended
	Sep. 30, 2022
Deposits [Abstract]
Deposits	Deposits The following table is a summary of deposits as of the dates shown: (Dollars in thousands) September 30, December 31, September 30, Balance: Non-interest-bearing $ 13,529,277 $ 14,179,980 $ 13,255,417 NOW and interest-bearing demand deposits 5,676,122 4,646,944 4,255,940 Wealth management deposits 2,988,195 2,612,759 2,300,818 Money market 12,538,489 12,840,432 12,148,541 Savings 3,988,790 3,846,681 3,861,296 Time certificates of deposit 4,076,318 3,968,789 4,130,546 Total deposits $ 42,797,191 $ 42,095,585 $ 39,952,558 Mix: Non-interest-bearing 32 % 34 % 33 % NOW and interest-bearing demand deposits 13 11 11 Wealth management deposits 7 6 6 Money market 29 31 30 Savings 9 9 10 Time certificates of deposit 10 9 10 Total deposits 100 % 100 % 100 % Wealth management deposits represent deposit balances (primarily money market accounts) at the Company’s subsidiary banks from brokerage customers of Wintrust Investments, LLC (“Wintrust Investments”), Chicago Deferred Exchange Company (“CDEC”) and trust and asset management customers of the Company.

FHLB Advances, Other Borrowings

FHLB Advances, Other Borrowings and Subordinated Notes	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
FHLB Advances, Other Borrowings and Subordinated Notes	FHLB Advances, Other Borrowings and Subordinated Notes The following table is a summary of FHLB advances, other borrowings and subordinated notes as of the dates shown: (In thousands) September 30, December 31, September 30, FHLB advances $ 2,316,071 $ 1,241,071 $ 1,241,071 Other borrowings: Notes payable 64,268 80,319 85,668 Short-term borrowings 9,212 9,198 14,051 Secured borrowings 311,958 341,327 341,038 Other 61,777 63,292 63,770 Total other borrowings 447,215 494,136 504,527 Subordinated notes 437,260 436,938 436,811 Total FHLB advances, other borrowings and subordinated notes $ 3,200,546 $ 2,172,145 $ 2,182,409 FHLB Advances FHLB advances consist of obligations of the banks and are collateralized by qualifying commercial and residential real estate and home equity loans and certain securities. FHLB advances are stated at par value of the debt adjusted for unamortized prepayment fees paid at the time of prior restructurings of FHLB advances, unamortized fair value adjustments recorded in connection with advances acquired through acquisitions and debt issuance costs. Notes Payable On September 18, 2018, the Company established a term facility (“Term Facility”), which is part of a loan agreement (“Credit Agreement”) with unaffiliated banks. The Credit Agreement consists of the Term Facility with an original outstanding balance of $150.0 million and a $100.0 million revolving credit facility (“Revolving Credit Facility”). The Term Facility is stated at par of the current outstanding balance of the debt adjusted for unamortized costs paid by the Company in relation to the debt issuance. Unamortized costs paid by the Company in relation to the issuance of the Revolving Credit Facility are classified in other assets on the Consolidated Statements of Condition. The Company was contractually required to borrow the entire amount of the Term Facility on September 18, 2018 and all such borrowings must be repaid by September 18, 2023. The Company is required to make quarterly payments of principal plus interest on the Term Facility. At September 30, 2022, the Company had a notes payable balance of $64.3 million under the Term Facility. At September 30, 2022, the Company had no outstanding balance under the Revolving Credit Facility. An additional amendment to the Credit Agreement was executed and effective as of September 13, 2022. The amendment provided for, among other things, increases in the applicable rate with respect to each Term SOFR Loan (in the case of a borrowing under the Revolving Credit Facility) from 1.45% to 1.55% and with respect to each Base Rate Loan (in the case of a borrowing under the Revolving Credit Facility) from 0.60% to 0.70%. The amendment also extended the maturity date under the Revolving Credit Facility to September 12, 2023. Borrowings under the amended Credit Agreement that are considered “Base Rate Loans” bear interest at a rate equal to the sum of (1) 70 basis points (in the case of a borrowing under the Revolving Credit Facility) or 75 basis points (in the case of a borrowing under the Term Facility) plus (2) the highest of (a) the lenders prime rate, (b) the federal funds rate plus 50 basis points, and (c) Term SOFR for a one-month tenor in effect on such day plus 110 basis points (in the case of a borrowing under the Revolving Credit Facility) or the Eurodollar Rate (as defined below) that would be applicable for an interest period of one month plus 100 basis points (in the case of a borrowing under the Term Facility). Borrowings under the agreement that are considered “Term SOFR Loans” bear interest at a rate equal to the sum of (1) 155 basis points (in the case of a borrowing under the Revolving Credit Facility) or 125 basis points if considered “Eurodollar Rate Loans” (in the case of a borrowing under the Term Facility) plus (2) the SOFR rate for the applicable period, as adjusted for statutory reserve requirements for eurocurrency liabilities (the “Eurodollar Rate”). A commitment fee is payable quarterly equal to 0.30% of the actual daily amount by which the lenders’ commitment under the Revolving Credit Facility exceeded the amount outstanding under such facility. Borrowings under the amended Credit Agreement are secured by pledges of and first priority perfected security interests in the Company’s equity interest in its bank subsidiaries and contain several restrictive covenants, including the maintenance of various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on dividends and other indebtedness. At September 30, 2022, the Company was in compliance with all such covenants. The Revolving Credit Facility and the Term Facility are available to be utilized, as needed, to provide capital to fund continued growth at the Company’s banks and to serve as an interim source of funds for acquisitions, common stock repurchases or other general corporate purposes. Short-term Borrowings Short-term borrowings include securities sold under repurchase agreements of customer sweep accounts in connection with master repurchase agreements at the banks. These borrowings totaled $9.2 million at September 30, 2022 compared to $9.2 million at December 31, 2021 and $14.1 million at September 30, 2021. The Company records securities sold under repurchase agreements at their gross value and does not offset positions on the Consolidated Statements of Condition. As of September 30, 2022, the Company had pledged securities related to its customer balances in sweep accounts of $18.1 million. Securities pledged for customer balances in sweep accounts and short-term borrowings from brokers are maintained under the Company’s control and consist of mortgage-backed securities and U.S. government agencies. These securities are included in the available-for-sale portfolio as reflected on the Company’s Consolidated Statements of Condition. The following is a summary of these securities pledged as of September 30, 2022 disaggregated by investment category and maturity of the related customer sweep account, and reconciled to the outstanding balance of securities sold under repurchase agreements: (In thousands) Overnight Sweep Collateral Available-for-sale securities pledged U.S. government agencies $ 9,122 Mortgage-backed securities 8,972 Total collateral pledged 18,094 Excess collateral 8,882 Securities sold under repurchase agreements $ 9,212 Secured Borrowings Secured borrowings at September 30, 2022 primarily represent transactions to sell an undivided co-ownership interest in all receivables owed to the Company’s subsidiary, First Insurance Funding of Canada (“FIFC Canada”). In December 2014, FIFC Canada sold such interest to an unrelated third party in exchange for a cash payment of approximately C$150 million pursuant to a receivables purchase agreement (“Receivables Purchase Agreement”). Amendments to the Receivables Purchase Agreement since issuance increased the total payments to C$420 million and extended the maturity date to December 15, 2023. These transactions were not considered sales of receivables and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the unrelated third party, net of unamortized debt issuance costs, and translated to the Company’s reporting currency as of the respective date. At September 30, 2022, the translated balance of the secured borrowing totaled $303.5 million compared to $332.2 million at December 31, 2021 and $331.0 million at September 30, 2021. The interest rate under the Receivables Purchase Agreement is the Canadian Commercial Paper Rate plus 78 basis points. The remaining $8.4 million within secured borrowings at September 30, 2022 represents other sold interests in certain loans by the Company that were not considered sales and, as such, related proceeds received are reflected on the Company’s Consolidated Statements of Condition as a secured borrowing owed to the various unrelated third parties. Other Borrowings Other borrowings at September 30, 2022 represent a fixed-rate promissory note (“Fixed-Rate Promissory Note”) issued by the Company in June 2017. Amendments to the Fixed-Rate Promissory Note since issuance increased the principal amount to $66.4 million, reduced the interest rate to 1.70% and extended the maturity date to March 31, 2025. The Fixed-Rate Promissory Note relates to and is secured by three office buildings owned by the Company. At September 30, 2022, the Fixed-Rate Promissory Note had a balance of $61.8 million compared to $63.3 million at December 31, 2021 and $63.8 million at September 30, 2021. Under the Fixed-Rate Promissory Note, during the nine months ended September 30, 2022, the Company made monthly principal and interest payments. The Fixed-Rate Promissory Note contains several restrictive covenants, including the maintenance of various capital adequacy levels, asset quality and profitability ratios, and certain restrictions on dividends and indebtedness. At September 30, 2022, the Company was in compliance with all such covenants. Subordinated Notes At September 30, 2022, the Company had outstanding subordinated notes totaling $437.3 million compared to $436.9 million and $436.8 million outstanding at December 31, 2021 and September 30, 2021, respectively. In 2019, the Company issued $300.0 million of subordinated notes, receiving $296.7 million in net proceeds. The subordinated notes have a stated interest rate of 4.85% and mature in June 2029. In 2014, the Company issued $140.0 million of subordinated notes receiving $139.1 million in net proceeds. The subordinated notes have a stated interest rate of 5.00% and mature in June 2024. Subordinated notes are stated at par adjusted for unamortized issuance costs paid related to such debt.

Junior Subordinated Debentures

Junior Subordinated Debentures	9 Months Ended
	Sep. 30, 2022
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Junior Subordinated Debentures	Junior Subordinated Debentures As of September 30, 2022, the Company owned 100% of the common securities of eleven trusts, Wintrust Capital Trust III, Wintrust Statutory Trust IV, Wintrust Statutory Trust V, Wintrust Capital Trust VII, Wintrust Capital Trust VIII, Wintrust Capital Trust IX, Northview Capital Trust I, Town Bankshares Capital Trust I, First Northwest Capital Trust I, Suburban Illinois Capital Trust II, and Community Financial Shares Statutory Trust II (the “Trusts”) set up to provide long-term financing. The Northview, Town, First Northwest, Suburban, and Community Financial Shares capital trusts were acquired as part of the acquisitions of Northview Financial Corporation, Town Bankshares, Ltd., First Northwest Bancorp, Inc., Suburban Illinois Bancorp, Inc. and Community Financial Shares, Inc., respectively. The Trusts were formed for purposes of issuing trust preferred securities to third-party investors and investing the proceeds from the issuance of the trust preferred securities and common securities solely in junior subordinated debentures issued by the Company (or assumed by the Company in connection with an acquisition), with the same maturities and interest rates as the trust preferred securities. The junior subordinated debentures are the sole assets of the Trusts. In each Trust, the common securities represent approximately 3% of the junior subordinated debentures and the trust preferred securities represent approximately 97% of the junior subordinated debentures. The Trusts are reported in the Company’s consolidated financial statements as unconsolidated subsidiaries. Accordingly, in the Consolidated Statements of Condition, the junior subordinated debentures issued by the Company to the Trusts are reported as liabilities and the common securities of the Trusts, all of which are owned by the Company, are included in investment securities. The following table provides a summary of the Company’s junior subordinated debentures as of September 30, 2022. The junior subordinated debentures represent the par value of the obligations owed to the Trusts. (Dollars in thousands) Common Trust Junior Rate Contractual Rate at 9/30/2022 Issue Maturity Earliest Wintrust Capital Trust III $ 774 $ 25,000 $ 25,774 L+3.25 5.76 % 04/2003 04/2033 04/2008 Wintrust Statutory Trust IV 619 20,000 20,619 L+2.80 6.47 % 12/2003 12/2033 12/2008 Wintrust Statutory Trust V 1,238 40,000 41,238 L+2.60 6.27 % 05/2004 05/2034 06/2009 Wintrust Capital Trust VII 1,550 50,000 51,550 L+1.95 5.24 % 12/2004 03/2035 03/2010 Wintrust Capital Trust VIII 1,238 25,000 26,238 L+1.45 5.12 % 08/2005 09/2035 09/2010 Wintrust Capital Trust IX 1,547 50,000 51,547 L+1.63 4.92 % 09/2006 09/2036 09/2011 Northview Capital Trust I 186 6,000 6,186 L+3.00 5.78 % 08/2003 11/2033 08/2008 Town Bankshares Capital Trust I 186 6,000 6,186 L+3.00 5.78 % 08/2003 11/2033 08/2008 First Northwest Capital Trust I 155 5,000 5,155 L+3.00 6.67 % 05/2004 05/2034 05/2009 Suburban Illinois Capital Trust II 464 15,000 15,464 L+1.75 5.04 % 12/2006 12/2036 12/2011 Community Financial Shares Statutory Trust II 109 3,500 3,609 L+1.62 4.91 % 06/2007 09/2037 06/2012 Total $ 253,566 5.52 % The junior subordinated debentures totaled $253.6 million at September 30, 2022, December 31, 2021 and September 30, 2021. The interest rates on the variable rate junior subordinated debentures are based on the three-month LIBOR rate and reset on a quarterly basis. At September 30, 2022, the weighted average contractual interest rate on the junior subordinated debentures was 5.52%. Prior to 2021, the Company entered into interest rate swaps with an aggregate notional value of $210.0 million to hedge the variable cash flows on certain junior subordinated debentures. Such interest rate swaps matured in 2021 and no separate hedging derivatives were outstanding at September 30, 2022. Distributions on the common and preferred securities issued by the Trusts are payable quarterly at a rate per annum equal to the interest rates being earned by the Trusts on the junior subordinated debentures. Interest expense on the junior subordinated debentures is deductible for income tax purposes. The Company has guaranteed the payment of distributions and payments upon liquidation or redemption of the trust preferred securities, in each case to the extent of funds held by the Trusts. The Company and the Trusts believe that, taken together, the obligations of the Company under the guarantees, the junior subordinated debentures, and other related agreements provide, in the aggregate, a full, irrevocable and unconditional guarantee, on a subordinated basis, of all of the obligations of the Trusts under the trust preferred securities. Subject to certain limitations, the Company has the right to defer the payment of interest on the junior subordinated debentures at any time, or from time to time, for a period not to exceed 20 consecutive quarters. The trust preferred securities are subject to mandatory redemption, in whole or in part, upon repayment of the junior subordinated debentures at maturity or their earlier redemption. The junior subordinated debentures are redeemable in whole or in part prior to maturity at any time after the earliest redemption dates shown in the table, and earlier at the discretion of the Company if certain conditions are met, and, in any event, only after the Company has obtained Federal Reserve Bank (“FRB”) approval, if then required under applicable guidelines or regulations. At September 30, 2022, the Company included $245.5 million of the junior subordinated debentures, net of common securities, in Tier 2 regulatory capital.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Sep. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers Disaggregation of Revenue The following table presents revenue from contracts with customers, disaggregated by the revenue source: (Dollars in thousands) Three Months Ended Nine Months Ended Revenue from contracts with customers Location in income statement September 30, September 30, September 30, September 30, Brokerage and insurance product commissions Wealth management $ 4,587 $ 5,230 $ 13,491 $ 15,418 Trust Wealth management 11,213 5,369 24,397 15,765 Asset management Wealth management 17,324 20,932 57,999 60,347 Total wealth management 33,124 31,531 95,887 91,530 Mortgage broker fees Mortgage banking 158 270 714 460 Service charges on deposit accounts Service charges on deposit accounts 14,349 14,149 45,520 39,434 Administrative services Other non-interest income 1,533 1,359 4,977 3,843 Card-related fees Other non-interest income 3,003 2,513 8,320 6,474 Other deposit-related fees Other non-interest income 3,556 3,397 10,101 9,979 Total revenue from contracts with customers $ 55,723 $ 53,219 $ 165,519 $ 151,720 Wealth Management Revenue Wealth management revenue is comprised of brokerage and insurance product commissions, managed money fees and trust and asset management revenue of the Company's four wealth management subsidiaries: Wintrust Investments, Great Lakes Advisors, LLC ("GLA"), The Chicago Trust Company, N.A. ("CTC") and CDEC. All wealth management revenue is recognized in the wealth management segment. Brokerage and insurance product commissions consists primarily of commissions earned from trade execution services on behalf of customers and from selling mutual funds, insurance and other investment products to customers. For trade execution services, the Company recognizes commissions and receives payment from the brokerage customers at the point of transaction execution. Commissions received from the investment or insurance product providers are recognized at the point of sale of the product. The Company also receives trail and other commissions from providers for certain plans. These are generally based on qualifying account values and are recognized once the performance obligation, specific to each provider, is satisfied on a monthly, quarterly or annual basis. Trust revenue is earned primarily from trust and custody services that are generally performed over time as well as fees earned on funds held during the facilitation of tax-deferred like-kind exchange transactions. Revenue is determined periodically based on a schedule of fees applied to the value of each customer account using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Fees are typically billed on a calendar month or quarterly basis in advance or in arrears depending upon the contract. Upfront fees received related to the facilitation of tax-deferred like-kind exchange transactions are deferred until the transaction is completed. Additional fees earned for certain extraordinary services performed on behalf of the customers are recognized when the service has been performed. Asset management revenue is earned from money management and advisory services that are performed over time. Revenue is based primarily on the market value of assets under management or administration using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Fees are typically billed on a calendar month or quarter basis in advance or in arrears depending upon the contract. Certain programs provide the customer with an option of paying fees as a percentage of the account value or incurring commission charges for each trade similar to brokerage and insurance product commissions. Trade commissions and any other fees received for additional services are recognized at the point in time when the performance obligation has been satisfied. Mortgage Broker Fees For customers desiring a mortgage product not currently offered by the Company, the Company may refer such customers and, with permission, direct such customers' applications to certain third party mortgage brokers. Mortgage broker fees are received from these brokers for such customer referrals upon settlement of the underlying mortgage. The Company's entitlement to the consideration is contingent on the settlement of the mortgage which is highly susceptible to factors outside of the Company's influence, such as third party broker's underwriting requirements. Also, the uncertainty surrounding the consideration could be resolved in varying lengths of time, dependent upon the third party brokers. Therefore, mortgage broker fees are recognized at the settlement of the underlying mortgage when the consideration is received. Broker fees are recognized in the community banking segment. Service Charges on Deposit Accounts Service charges on deposit accounts include fees charged to deposit customers for various services, including account analysis services, and are based on factors such as the size and type of customer, type of product and number of transactions. The fees are based on a standard schedule of fees and, depending on the nature of the service performed, the service is performed at a point in time or over a period of a month. When the service is performed at a point in time, the Company recognizes and receives revenue when the service has been performed. When the service is performed over a period of a month, the Company recognizes and receives revenue in the month the service has been performed. Service charges on deposit accounts are recognized in the community banking segment. Administrative Services Administrative services revenue is earned from providing outsourced administrative services, such as data processing of payrolls, billing and cash management services, to temporary staffing service clients located throughout the United States. Fees are charged periodically (typically once within a payroll cycle) and computed in accordance with the contractually determined rate applied to the total gross billings administered for the period. The revenue is recognized over the period using a time-elapsed method to measure progress toward complete satisfaction of the performance obligation. Other fees are charged on a per occurrence basis as the service is provided in the billing cycle. The Company has certain contracts with customers to perform outsourced administrative services and short-term accounts receivable financing. For these contracts, the total fee is allocated between the administrative services revenue and interest income during the client onboarding process based on the specific client and services provided. Administrative services revenue is recognized in the specialty finance segment. Card and Other Deposit-Related Fees Card-related fees include interchange and merchant revenue, and fees related to debit and credit cards. Interchange revenue is related to the Company-issued debit cards. Other deposit-related fees primarily include pay by phone processing fees, ATM and safe deposit box fees, check order charges and foreign currency related fees. Card and deposit-related fees are generally based on volume of transactions and are recognized at the point in time when the service has been performed. For any consideration that is constrained, the revenue is recognized once the uncertainty becomes known. Upfront fees received from certain contracts are recognized on a straight line basis over the term of the contract. Card and deposit-related fees are recognized in the community banking segment. Contract Balances The following table provides information about contract assets, contract liabilities and receivables from contracts with customers: (Dollars in thousands) September 30, December 31, September 30, Contract assets $ — $ — $ — Contract liabilities $ 1,382 $ 1,588 $ 1,632 Mortgage broker fees receivable $ 24 $ 73 $ 31 Administrative services receivable 103 68 185 Wealth management receivable 17,670 11,748 12,001 Card-related fees receivable 612 921 462 Total receivables from contracts with customer $ 18,409 $ 12,810 $ 12,679 Contract liabilities represent upfront fees that the Company received at inception of certain contracts. The revenue recognized that was included in the contract liability balance at beginning of the period totaled $977,000 and $798,000 for the nine months ended September 30, 2022 and 2021, respectively. Receivables are recognized in the period the Company provides services and when the Company's right to consideration is unconditional. The card-related fee receivable is the result of volume-based fees that the Company receives from a customer on an annual basis in the second quarter of each year. Payment terms on other invoiced amounts are typically 30 days or less. Contract liabilities and receivables from contracts with customers are included within the accrued interest payable and other liabilities and accrued interest receivable and other assets line items, respectively, in the Consolidated Statements of Condition. Transaction price allocated to the remaining performance obligations The following table presents the estimated future timing of recognition of upfront fees related to card and deposit-related fees. These upfront fees represent performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period. (Dollars in thousands) Estimated remaining in 2022 $ 366 Estimated—2023 666 Estimated—2024 250 Estimated—2025 100 Estimated—2026 — Total $ 1,382 Practical Expedients and Exemptions The Company does not adjust the promised amount of consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the Company transfers a promised service to a customer and when the customer pays for that service is one year or less. The Company recognizes the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that the entity otherwise would have recognized is one year or less.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Segment Information	Segment Information The Company’s operations consist of three primary segments: community banking, specialty finance and wealth management. The three reportable segments are strategic business units that are separately managed as they offer different products and services and have different marketing strategies. In addition, each segment’s customer base has varying characteristics and each segment has a different regulatory environment. While the Company’s management monitors each of the fifteen bank subsidiaries’ operations and profitability separately, these subsidiaries have been aggregated into one reportable operating segment due to the similarities in products and services, customer base, operations, profitability measures, and economic characteristics. For purposes of internal segment profitability, management allocates certain intersegment and parent company balances. Management allocates a portion of revenues to the specialty finance segment related to loans and leases originated by the specialty finance segment and sold or assigned to the community banking segment. Similarly, for purposes of analyzing the contribution from the wealth management segment, management allocates a portion of the net interest income earned by the community banking segment on deposit balances of customers of the wealth management segment to the wealth management segment. See Note 10 - Deposits, for more information on these deposits. Finally, expenses incurred at the Wintrust parent company are allocated to each segment based on each segment’s risk-weighted assets. The segment financial information provided in the following table has been derived from the internal profitability reporting system used by management to monitor and manage the financial performance of the Company. The accounting policies of the segments are substantially similar to those described in “Summary of Significant Accounting Policies” in Note 1 of the Company’s 2021 Form 10-K. The Company evaluates segment performance based on after-tax profit or loss and other appropriate profitability measures common to each segment. The following is a summary of certain operating information for reportable segments: Three Months Ended $ Change in % Change in (Dollars in thousands) September 30, September 30, Net interest income: Community Banking $ 319,929 $ 220,007 $ 99,922 45 % Specialty Finance 64,122 52,659 11,463 22 Wealth Management 9,585 7,983 1,602 20 Total Operating Segments 393,636 280,649 112,987 40 Intersegment Eliminations 7,812 6,847 965 14 Consolidated net interest income $ 401,448 $ 287,496 $ 113,952 40 % Provision for credit losses: Community Banking $ 3,608 $ (7,433) $ 11,041 NM Specialty Finance 2,812 (483) 3,295 NM Wealth Management — — — — Total Operating Segments 6,420 (7,916) 14,336 NM Intersegment Eliminations — — — — Consolidated provision for credit losses $ 6,420 $ (7,916) $ 14,336 NM Non-interest income: Community Banking $ 60,615 $ 94,292 $ (33,677) (36) % Specialty Finance 23,784 24,426 (642) (3) Wealth Management 32,452 33,557 (1,105) (3) Total Operating Segments 116,851 152,275 (35,424) (23) Intersegment Eliminations (15,369) (15,801) 432 (3) Consolidated non-interest income $ 101,482 $ 136,474 $ (34,992) (26) % Net revenue: Community Banking $ 380,544 $ 314,299 $ 66,245 21 % Specialty Finance 87,906 77,085 10,821 14 Wealth Management 42,037 41,540 497 1 Total Operating Segments 510,487 432,924 77,563 18 Intersegment Eliminations (7,557) (8,954) 1,397 (16) Consolidated net revenue $ 502,930 $ 423,970 $ 78,960 19 % Segment profit: Community Banking $ 104,668 $ 68,790 $ 35,878 52 % Specialty Finance 27,187 30,202 (3,015) (10) Wealth Management 11,106 10,145 961 9 Consolidated net income $ 142,961 $ 109,137 $ 33,824 31 % Segment assets: Community Banking $ 41,193,521 $ 38,464,169 $ 2,729,352 7 % Specialty Finance 9,450,977 7,918,933 1,532,044 19 Wealth Management 1,738,441 1,449,169 289,272 20 Consolidated total assets $ 52,382,939 $ 47,832,271 $ 4,550,668 10 % NM - Not meaningful Nine Months Ended $ Change in % Change in (Dollars in thousands) September 30, September 30, Net interest income: Community Banking $ 810,270 $ 643,175 $ 167,095 26 % Specialty Finance 178,210 142,752 35,458 25 Wealth Management 27,495 23,197 4,298 19 Total Operating Segments 1,015,975 809,124 206,851 26 Intersegment Eliminations 22,571 19,857 2,714 14 Consolidated net interest income $ 1,038,546 $ 828,981 $ 209,565 25 % Provision for credit losses: Community Banking $ 27,951 $ (69,168) $ 97,119 NM Specialty Finance 2,992 606 2,386 NM Wealth Management — — — — Total Operating Segments 30,943 (68,562) 99,505 NM Intersegment Eliminations — — — — Consolidated provision for credit losses $ 30,943 $ (68,562) $ 99,505 NM Non-interest income: Community Banking $ 245,217 $ 331,970 $ (86,753) (26) % Specialty Finance 72,898 69,999 2,899 4 Wealth Management 93,256 95,651 (2,395) (3) Total Operating Segments 411,371 497,620 (86,249) (17) Intersegment Eliminations (44,157) (45,267) 1,110 (2) Consolidated non-interest income $ 367,214 $ 452,353 $ (85,139) (19) % Net revenue: Community Banking $ 1,055,487 $ 975,145 $ 80,342 8 % Specialty Finance 251,108 212,751 38,357 18 Wealth Management 120,751 118,848 1,903 2 Total Operating Segments 1,427,346 1,306,744 120,602 9 Intersegment Eliminations (21,586) (25,410) 3,824 (15) Consolidated net revenue $ 1,405,760 $ 1,281,334 $ 124,426 10 % Segment profit: Community Banking $ 249,414 $ 263,343 $ (13,929) (5) % Specialty Finance 87,349 77,955 9,394 12 Wealth Management 28,102 26,096 2,006 8 Consolidated net income $ 364,865 $ 367,394 $ (2,529) (1) % NM - Not meaningful

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Company primarily enters into derivative financial instruments as part of its strategy to manage its exposure to changes in interest rates. Derivative instruments represent contracts between parties that result in one party delivering cash to the other party based on a notional amount and an underlying term (such as a rate, security price or price index) as specified in the contract. The amount of cash delivered from one party to the other is determined based on the interaction of the notional amount of the contract with the underlying term. Derivatives are also implicit in certain contracts and commitments. The derivative financial instruments currently used by the Company to manage its exposure to interest rate risk include: (1) interest rate swaps and collars to manage the interest rate risk of certain fixed and variable rate assets and variable rate liabilities; (2) interest rate lock commitments provided to customers to fund certain mortgage loans to be sold into the secondary market; (3) forward commitments for the future delivery of such mortgage loans to protect the Company from adverse changes in interest rates and corresponding changes in the value of mortgage loans held-for-sale; (4) covered call options to economically hedge specific investment securities and receive fee income, effectively enhancing the overall yield on such securities to compensate for net interest margin compression; and (5) options and swaps to economically hedge a portion of the fair value adjustments related to the Company’s mortgage servicing rights portfolio. The Company also enters into derivatives (typically interest rate swaps) with certain qualified borrowers to facilitate the borrowers’ risk management strategies and concurrently enters into mirror-image derivatives with a third party counterparty, effectively making a market in the derivatives for such borrowers. Additionally, the Company enters into foreign currency contracts to manage foreign exchange risk associated with certain foreign currency denominated assets. The Company recognizes derivative financial instruments in the consolidated financial statements at fair value regardless of the purpose or intent for holding the instrument. The Company records derivative assets and derivative liabilities on the Consolidated Statements of Condition within accrued interest receivable and other assets and accrued interest payable and other liabilities, respectively. Changes in the fair value of derivative financial instruments are either recognized in income or in shareholders’ equity as a component of accumulated other comprehensive income or loss depending on whether the derivative financial instrument qualifies for hedge accounting and, if so, whether it qualifies as a fair value hedge or cash flow hedge. Changes in fair values of derivatives accounted for as fair value hedges are recorded in income in the same period and in the same income statement line as changes in the fair values of the hedged items that relate to the hedged risk(s). Changes in fair values of derivative financial instruments accounted for as cash flow hedges are recorded as a component of accumulated other comprehensive income or loss, net of deferred taxes, and reclassified to earnings when the hedged transaction affects earnings. Changes in fair values of derivative financial instruments not designated in a hedging relationship pursuant to ASC 815 are reported in non-interest income during the period of the change. Derivative financial instruments are valued by a third party and are corroborated by comparison with valuations provided by the respective counterparties. Fair values of certain mortgage banking derivatives (interest rate lock commitments and forward commitments to sell mortgage loans) are estimated based on changes in mortgage interest rates from the date of the loan commitment. The fair value of foreign currency derivatives is computed based on changes in foreign currency rates stated in the contract compared to those prevailing at the measurement date. The table below presents the fair value of the Company’s derivative financial instruments as of September 30, 2022, December 31, 2021 and September 30, 2021: Derivative Assets Derivative Liabilities (In thousands) September 30, December 31, September 30, September 30, December 31, September 30, Derivatives designated as hedging instruments under ASC 815: Interest rate derivatives designated as Cash Flow Hedges $ 725 $ 47,309 $ 37,529 $ 71,427 $ 10,401 $ 18,054 Interest rate derivatives designated as Fair Value Hedges 17,543 1,474 839 — 5,841 8,427 Total derivatives designated as hedging instruments under ASC 815 $ 18,268 $ 48,783 $ 38,368 $ 71,427 $ 16,242 $ 26,481 Derivatives not designated as hedging instruments under ASC 815: Interest rate derivatives $ 281,030 $ 103,710 $ 130,947 $ 281,999 $ 103,665 $ 131,097 Interest rate lock commitments 141 10,560 16,795 273 885 753 Forward commitments to sell mortgage loans 10,896 1,625 5,260 326 1,878 2,740 Foreign exchange contracts 3,145 330 242 3,145 330 243 Total derivatives not designated as hedging instruments under ASC 815 $ 295,212 $ 116,225 $ 153,244 $ 285,743 $ 106,758 $ 134,833 Total Derivatives $ 313,480 $ 165,008 $ 191,612 $ 357,170 $ 123,000 $ 161,314 Cash Flow Hedges of Interest Rate Risk The Company’s objectives in using interest rate derivatives are to add stability to net interest income and to manage its exposure to interest rate movements. To accomplish these objectives, the Company primarily uses interest rate swaps and interest rate collars as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the settlement of variable-rate amounts to or from a counterparty in exchange for the Company receiving or paying fixed-rate payments over the life of the agreements without the exchange of the underlying notional amount. Interest rate collars designated as cash flow hedges involve the settlement of amounts in which the interest rate specified in the contract exceeds the agreed upon cap strike price or in which the interest rate specified in the contract is below the agreed upon floor strike price at the end of each period. As of September 30, 2022, the Company had various interest rate collar derivatives designated as cash flow hedges of variable rate loans and one interest rate collar derivative designated as a cash flow hedge of the Company’s variable rate Term Facility. When the relationship between the hedged item and hedging instrument is highly effective at achieving offsetting changes in cash flows attributable to the hedged risk, changes in the fair value of these cash flow hedges are recorded in accumulated other comprehensive income or loss and are subsequently reclassified to interest income and interest expense as interest payments are made on such variable rate loans and the Term Facility, respectively. The changes in fair value (net of tax) are separately disclosed in the Consolidated Statements of Comprehensive Income. The table below provides details on these cash flow hedges, summarized by derivative type and maturity, as of September 30, 2022: September 30, 2022 Notional Fair Value (In thousands) Amount Asset (Liability) Interest Rate Collars: 3-month LIBOR; sell 2.881% floor, buy 3.050% cap; matures September 2023 $ 64,286 $ 725 1-month CME term SOFR; buy 2.250% floor, sell 3.743% cap; matures September 2025 1,250,000 (23,381) 1-month CME term SOFR; buy 2.750% floor, sell 4.320% cap; matures October 2026 500,000 (4,536) 1-month CME term SOFR; buy 2.000% floor, sell 3.450% cap; matures September 2027 1,250,000 (43,510) Total Cash Flow Hedges $ 3,064,286 $ (70,702) In the first quarter of 2022, the Company terminated interest rate swap derivative contracts designated as cash flow hedges of variable rate deposits with a total notional value of $1.0 billion and a five-year term effective July 2022. At the time of termination, the fair value of the derivative contracts totaled an asset of $66.5 million, with such adjustments to fair value recorded in accumulated other comprehensive income or loss. In the second quarter of 2022, the Company terminated two additional interest rate swap derivative contracts designated as cash flow hedges of variable rate deposits with a total notional value of $500.0 million each effective since April 2020. The remaining terms of such derivative contracts were through March 2023 and April 2024 and, at the time of termination, the fair value of the derivative contracts totaled assets of $3.7 million and $10.7 million, respectively, with such adjustments to fair value recorded in accumulated other comprehensive income or loss. For all such terminations, as the hedged forecasted transactions (interest payments on variable rate deposits) are still expected to occur over the remaining term of such terminated derivatives, such adjustments will remain in accumulated other comprehensive income or loss and be reclassified as a reduction to interest expense on a straight-line basis over the original term of the terminated derivative contracts. A rollforward of the amounts in accumulated other comprehensive income or loss related to interest rate derivatives designated as cash flow hedges, including such derivative contracts terminated during the period, follows: Three Months Ended Nine Months Ended (In thousands) September 30, September 30, September 30, September 30, Unrealized gain (loss) at beginning of period $ 78,764 $ 10,471 $ 36,908 $ (31,533) Amount reclassified from accumulated other comprehensive income or loss to interest expense on deposits, other borrowings and junior subordinated debentures (5,451) 6,780 914 20,342 Amount of (loss) income recognized in other comprehensive income (70,990) 2,224 (35,499) 30,666 Unrealized gain at end of period $ 2,323 $ 19,475 $ 2,323 $ 19,475 As of September 30, 2022, the Company estimates that during the next twelve months $4.3 million will be reclassified from accumulated other comprehensive income or loss as an increase to net interest income. Such estimate consists of $20.5 million reclassified as a reduction to interest expense on the terminated cash flow hedges discussed above, partially offset by estimated amounts to be reclassified as a reduction to interest income related to the interest rate collars noted above that remain outstanding. Fair Value Hedges of Interest Rate Risk Interest rate swaps designated as fair value hedges involve the payment of fixed amounts to a counterparty in exchange for the Company receiving variable payments over the life of the agreements without the exchange of the underlying notional amount. As of September 30, 2022, the Company had 14 interest rate swaps with an aggregate notional amount of $205.4 million that were designated as fair value hedges primarily associated with fixed rate commercial and industrial and commercial real estate loans as well as life insurance premium finance receivables. For derivatives designated and that qualify as fair value hedges, the net gain or loss from the entire change in the fair value of the derivative instrument is recognized in the same income statement line item as the earnings effect, including the net gain or loss, of the hedged item (interest income earned on fixed rate loans) when the hedged item affects earnings. The following table presents the carrying amount of the hedged assets/(liabilities) and the cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged assets/(liabilities) that are designated as a fair value hedge accounting relationship as of September 30, 2022: September 30, 2022 (In thousands) Derivatives in Fair Value Hedging Relationships Location in the Statement of Condition Carrying Amount of the Hedged Assets/(Liabilities) Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities) Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets/(Liabilities) for which Hedge Accounting has been Discontinued Interest rate swaps Loans, net of unearned income $ 187,357 $ (17,481) $ (113) Available-for-sale debt securities 931 (23) — The following table presents the loss or gain recognized related to derivative instruments that are designated as fair value hedges for the respective period: (In thousands) Derivatives in Fair Value Hedging Relationships Location of (Loss)/Gain Recognized Three Months Ended Nine Months Ended September 30, 2022 September 30, 2022 Interest rate swaps Interest and fees on loans $ — $ 23 Interest income - investment securities — — Non-Designated Hedges The Company does not use derivatives for speculative purposes. Derivatives not designated as accounting hedges are used to manage the Company’s economic exposure to interest rate movements and other identified risks but do not meet the strict hedge accounting requirements of ASC 815. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings. Interest Rate Derivatives —Periodically, the Company may purchase interest rate cap derivatives designed to act as an economic hedge of the risk of the negative impact on its fixed-rate loan portfolios from rising interest rates, most recently related to the LIBOR index. As of September 30, 2022, there were no interest rate caps outstanding that were designed to act as an economic hedge. In the second quarter of 2022, the Company terminated an interest rate cap derivative contract related to LIBOR that was not designated as an accounting hedge with a total notional value of $1.0 billion. Additionally, the Company has interest rate derivatives, including swaps and option products, resulting from a service the Company provides to certain qualified borrowers. The Company’s banking subsidiaries execute certain derivative products (typically interest rate swaps) directly with qualified commercial borrowers to facilitate their respective risk management strategies. For example, these arrangements allow the Company’s commercial borrowers to effectively convert a variable rate loan to a fixed rate. In order to minimize the Company’s exposure on these transactions, the Company simultaneously executes offsetting derivatives with third parties. In most cases, the offsetting derivatives have mirror-image terms, which result in the positions’ changes in fair value substantially offsetting through earnings each period. However, to the extent that the derivatives are not a mirror-image and because of differences in counterparty credit risk, changes in fair value will not completely offset resulting in some earnings impact each period. Changes in the fair value of these derivatives are included in other non-interest income. At September 30, 2022, the Company had interest rate derivative transactions with an aggregate notional amount of approximately $9.3 billion (all interest rate swaps and caps with customers and third parties) related to this program. These interest rate derivatives had maturity dates ranging from October 2022 to January 2037. Mortgage Banking Derivatives— These derivatives include interest rate lock commitments provided to customers to fund certain mortgage loans to be sold into the secondary market and forward commitments for the future delivery of such loans. It is the Company’s practice to enter into forward commitments for the future delivery of a portion of its residential mortgage loan production when interest rate lock commitments are entered into in order to economically hedge the effect of future changes in interest rates on its commitments to fund the loans as well as on its portfolio of mortgage loans held-for-sale. The Company’s mortgage banking derivatives have not been designated as being in hedge relationships. At September 30, 2022, the Company had interest rate lock commitments with an aggregate notional amount of approximately $209.2 million and forward commitments to sell mortgage loans with an aggregate notional amount of approximately $493.8 million. The fair values of these derivatives were estimated based on changes in mortgage rates from the dates of the commitments. Changes in the fair value of these mortgage banking derivatives are included in mortgage banking revenue. Foreign Currency Derivatives— These derivatives include foreign currency contracts used to manage the foreign exchange risk associated with foreign currency denominated assets and transactions. Foreign currency contracts, which include spot and forward contracts, represent agreements to exchange the currency of one country for the currency of another country at an agreed-upon price on an agreed-upon settlement date. As a result of fluctuations in foreign currencies, the U.S. dollar-equivalent value of the foreign currency denominated assets or forecasted transactions increase or decrease. Gains or losses on the derivative instruments related to these foreign currency denominated assets or forecasted transactions are expected to substantially offset this variability. As of September 30, 2022, the Company held foreign currency derivatives with an aggregate notional amount of approximately $281.0 million. Other Derivatives— Periodically, the Company will sell options to a bank or dealer for the right to purchase certain securities held within the banks’ investment portfolios (covered call options). These option transactions are designed to increase the total return associated with the investment securities portfolio. These options do not qualify as accounting hedges pursuant to ASC 815 and, accordingly, changes in the fair value of these contracts are recognized as other non-interest income. There were no covered call options outstanding as of September 30, 2022, December 31, 2021 or September 30, 2021. Periodically, the Company will purchase options for the right to purchase securities not currently held within the banks' investment portfolios or enter into interest rate swaps in which the Company elects to not designate such derivatives as hedging instruments. These option and swap transactions are designed primarily to economically hedge a portion of the fair value adjustments related to the Company's mortgage servicing rights portfolio. The gain or loss associated with these derivative contracts are included in mortgage banking revenue. As of September 30, 2022, the Company held three interest rate swaps with an aggregate notional value of $190.0 million for such purpose of economically hedging a portion of the fair value adjustment related to its mortgage servicing rights portfolio. There were no such options or swaps outstanding as of December 31, 2021 or September 30, 2021. Amounts included in the Consolidated Statements of Income related to derivative instruments not designated in hedge relationships were as follows: (In thousands) Three Months Ended Nine Months Ended Derivative Location in income statement September 30, September 30, September 30, September 30, Interest rate swaps and caps Trading (losses) gains, net $ (54) $ 55 $ 4,131 $ (56) Mortgage banking derivatives Mortgage banking revenue (11,236) (4,201) (26,155) (32,160) Foreign exchange contracts Trading (losses) gains, net — (1) — (9) Covered call options Fees from covered call options 1,366 1,157 6,177 2,545 Derivative contract held as economic hedge on MSRs Mortgage banking revenue (2,318) — (2,318) — Credit Risk Derivative instruments have inherent risks, primarily market risk and credit risk. Market risk is associated with changes in interest rates and credit risk relates to the risk that the counterparty will fail to perform according to the terms of the agreement. The amounts potentially subject to market and credit risks are the streams of interest payments under the contracts and the market value of the derivative instrument and not the notional principal amounts used to express the volume of the transactions. Market and credit risks are managed and monitored as part of the Company’s overall asset-liability management process, except that the credit risk related to derivatives entered into with certain qualified borrowers is managed through the Company’s standard loan underwriting process since these derivatives are secured through collateral provided by the loan agreements. Actual exposures are monitored against various types of credit limits established to contain risk within parameters. When deemed necessary, appropriate types and amounts of collateral are obtained to minimize credit exposure. The Company has agreements with certain of its interest rate derivative counterparties that contain cross-default provisions, which provide that if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has agreements with certain of its derivative counterparties that contain a provision allowing the counterparty to terminate the derivative positions if the Company fails to maintain its status as a well or adequately capitalized institution, which would require the Company to settle its obligations under the agreements. As of September 30, 2022, there were no interest rate derivatives in a net liability position that were subject to such agreements. The fair value of such derivatives includes accrued interest related to these agreements. The Company is also exposed to the credit risk of its commercial borrowers who are counterparties to interest rate derivatives with the banks. This counterparty risk related to the commercial borrowers is managed and monitored through the banks’ standard underwriting process applicable to loans since these derivatives are secured through collateral provided by the loan agreement. The counterparty risk associated with the mirror-image swaps executed with third parties is monitored and managed in connection with the Company’s overall asset liability management process. The Company records interest rate derivatives subject to master netting agreements at their gross value and does not offset derivative assets and liabilities on the Consolidated Statements of Condition. The table below summarizes the Company’s interest rate derivatives and offsetting positions as of the dates shown. Derivative Assets Derivative Liabilities Fair Value Fair Value (In thousands) September 30, December 31, September 30, September 30, December 31, September 30, Gross Amounts Recognized $ 299,298 $ 152,493 $ 169,315 $ 353,426 $ 119,907 $ 157,578 Less: Amounts offset in the Statements of Condition — — — — — — Net amount presented in the Statements of Condition $ 299,298 $ 152,493 $ 169,315 $ 353,426 $ 119,907 $ 157,578 Gross amounts not offset in the Statements of Condition Offsetting Derivative Positions (74,101) (52,832) (42,645) (74,101) (52,832) (42,645) Collateral Posted (204,260) (3,530) — — (55,201) (110,440) Net Credit Exposure $ 20,937 $ 96,131 $ 126,670 $ 279,325 $ 11,874 $ 4,493

Fair Values of Assets and Liabi

Fair Values of Assets and Liabilities	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Fair Values of Assets and Liabilities	Fair Values of Assets and Liabilities The Company measures, monitors and discloses certain of its assets and liabilities on a fair value basis. These financial assets and financial liabilities are measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the observability of the inputs used to determine fair value. These levels are: • Level 1—unadjusted quoted prices in active markets for identical assets or liabilities. • Level 2 — inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability or inputs that are derived principally from or corroborated by observable market data by correlation or other means. • Level 3—significant unobservable inputs that reflect the Company’s own assumptions that market participants would use in pricing the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. A financial instrument’s categorization within the above valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the assets or liabilities. The following is a description of the valuation methodologies used for the Company’s assets and liabilities measured at fair value on a recurring basis. Available-for-sale debt securities, trading account securities and equity securities with readily determinable fair value —Fair values for available-for-sale debt securities, trading account securities and equity securities with readily determinable fair value are typically based on prices obtained from independent pricing vendors. Securities measured with these valuation techniques are generally classified as Level 2 of the fair value hierarchy. Typically, standard inputs such as benchmark yields, reported trades for similar securities, issuer spreads, benchmark securities, bids, offers and reference data including market research publications are used to determine the fair value of these securities. When these inputs are not available, broker/dealer quotes may be obtained by the vendor to determine the fair value of the security. We review the vendor’s pricing methodologies to determine if observable market information is being used, versus unobservable inputs. Fair value measurements using significant inputs that are unobservable in the market due to limited activity or a less liquid market are classified as Level 3 in the fair value hierarchy. The fair value of U.S. Treasury securities and certain equity securities with readily determinable fair value are based on unadjusted quoted prices in active markets for identical securities. As such, these securities are classified as Level 1 in the fair value hierarchy. The Company’s Investment Operations Department is responsible for the valuation of Level 3 available-for-sale debt securities. The methodology and variables used as inputs in pricing Level 3 securities are derived from a combination of observable and unobservable inputs. The unobservable inputs are determined through internal assumptions that may vary from period to period due to external factors, such as market movement and credit rating adjustments. At September 30, 2022, the Company classified $122.4 million of municipal securities as Level 3. These municipal securities are bond issues for various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin and are privately placed, non-rated bonds without CUSIP numbers. The Company’s methodology for pricing these securities focuses on three distinct inputs: equivalent rating, yield and other pricing terms. To determine the rating for a given non-rated investment debt security, the Investment Operations Department references a rated, publicly issued bond by the same issuer if available. A reduction is then applied to the rating obtained from the comparable bond, as the Company believes if liquidated, a non-rated bond would be valued less than a similar bond with a verifiable rating. The reduction applied by the Company is one complete rating grade (i.e. a “AA” rating for a comparable bond would be reduced to “A” for the Company’s valuation). For bond issues without comparable bond proxies, a rating of “BBB” was assigned. In the third quarter of 2022, all of the ratings derived by the Investment Operations Department using the above process were “BBB” or better. The fair value measurement noted above is sensitive to the rating input, as a higher rating typically results in an increased valuation. The remaining pricing inputs used in the bond valuation are observable. Based on the rating determined in the above process, Investment Operations obtains a corresponding current market yield curve available to market participants. Other terms including coupon, maturity date, redemption price, number of coupon payments per year, and accrual method are obtained from the individual bond term sheets. Certain municipal bonds held by the Company at September 30, 2022 are continuously callable. When valuing these bonds, the fair value is capped at par value as the Company assumes a market participant would not pay more than par for a continuously callable bond. Mortgage loans held-for-sale —The fair value of mortgage loans held-for-sale is typically determined by reference to investor price sheets for loan products with similar characteristics. Loans measured with this valuation technique are classified as Level 2 in the fair value hierarchy. At September 30, 2022, the Company classified $48.4 million of certain delinquent mortgage loans held-for-sale as Level 3. For such delinquent loans in which investor interest may be limited, the Company estimates fair value by discounting future scheduled cash flows for the specific loan through its life, adjusted for estimated credit losses. The Company uses a discount rate based on prevailing market coupon rates on loans with similar characteristics. The assumed weighted average discount rate used as an input to value these loans at September 30, 2022 was 6.19%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. Additionally, the weighted average credit discount used as an input to value the specific loans was 0.23% with credit loss discount ranging from 0%-14% at September 30, 2022. Loans held-for-investment —The fair value for certain loans in which the Company previously elected the fair value option is estimated by discounting future scheduled cash flows for the specific loan through maturity, adjusted for estimated credit losses and prepayment or life assumptions. These loans primarily consist of early buyout loans guaranteed by U.S. government agencies that are delinquent and, as a result, investor interest may be limited. The Company uses a discount rate based on the actual coupon rate of the underlying loan. At September 30, 2022, the Company classified $98.6 million of loans held-for-investment carried at fair value as Level 3. The assumed weighted average discount rate used as an input to value these loans at September 30, 2022 was 6.21%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. As noted above, the fair value estimate also includes assumptions of prepayment speeds and average life as well as credit losses. The weighted average prepayments speed used as an input to value current loans was 6.49% at September 30, 2022. Prepayment speeds are inversely related to the fair value of these loans as an increase in prepayment speeds results in a decreased valuation. For delinquent loans in which performance is not assumed and there is a higher probability of resolution of the loan ending in foreclosure, the weighted average life of such loans was 5.5 years. Average life is inversely related to the fair value of these loans as an increase in estimated life results in a decreased valuation. Additionally, the weighted average credit discount used as an input to value the specific loans was 0.61% with credit loss discounts ranging from 0%-35% at September 30, 2022. MSRs —Fair value for MSRs is determined utilizing a valuation model which calculates the fair value of each servicing right based on the present value of estimated future cash flows. The Company uses a discount rate commensurate with the risk associated with each servicing right, given current market conditions. At September 30, 2022, the Company classified $229.7 million of MSRs as Level 3. The weighted average discount rate used as an input to value the pool of MSRs at September 30, 2022 was 10.29% with discount rates applied ranging from 8%-20%. The higher the rate utilized to discount estimated future cash flows, the lower the fair value measurement. The fair value of MSRs was also estimated based on other assumptions including prepayment speeds and the cost to service. Prepayment speeds ranged from 0%-90% or a weighted average prepayment speed of 6.49%. Further, for current and delinquent loans, the Company assumed a weighted average cost of servicing of $75 and $371, respectively, per loan. Prepayment speeds and the cost to service are both inversely related to the fair value of MSRs as an increase in prepayment speeds or the cost to service results in a decreased valuation. See Note 9 - Mortgage Servicing Rights (“MSRs”) for further discussion of MSRs. Derivative instruments —The Company’s derivative instruments include interest rate swaps, caps and collars, commitments to fund mortgages for sale into the secondary market (interest rate locks), forward commitments to end investors for the sale of mortgage loans and foreign currency contracts. Interest rate swaps, caps and collars are valued by a third party, using models that primarily use market observable inputs, such as yield curves, and are classified as Level 2 in the fair value hierarchy. The credit risk associated with derivative financial instruments that are subject to master netting agreements is measured on a net basis by counterparty portfolio. The fair value for mortgage-related derivatives is based on changes in mortgage rates from the date of the commitments. The fair value of foreign currency derivatives is computed based on change in foreign currency rates stated in the contract compared to those prevailing at the measurement date. At September 30, 2022, the Company classified $141,000 of derivative assets related to interest rate locks as Level 3. The fair value of interest rate locks is based on prices obtained for loans with similar characteristics from third parties, adjusted for the pull-through rate, which represents the Company’s best estimate of the likelihood that a committed loan will ultimately fund. The weighted-average pull-through rate at September 30, 2022 was 85.48% with pull-through rates applied ranging from 2% to 100%. Pull-through rates are directly related to the fair value of interest rate locks as an increase in the pull-through rate results in an increased valuation. Nonqualified deferred compensation assets —The underlying assets relating to the nonqualified deferred compensation plan are included in a trust and primarily consist of non-exchange traded institutional funds which are priced based by an independent third party service. These assets are classified as Level 2 in the fair value hierarchy. The following tables present the balances of assets and liabilities measured at fair value on a recurring basis for the periods presented: September 30, 2022 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 44,013 — 44,013 — Municipal 174,001 — 51,569 122,432 Corporate notes 87,033 — 87,033 — Mortgage-backed 2,618,606 — 2,618,606 — Trading account securities 179 — 179 — Equity securities with readily determinable fair value 114,012 105,946 8,066 — Mortgage loans held-for-sale 376,160 — 327,740 48,420 Loans held-for-investment 156,893 — 58,326 98,567 MSRs 229,671 — — 229,671 Nonqualified deferred compensation assets 13,387 — 13,387 — Derivative assets 313,480 — 313,339 141 Total $ 4,127,435 $ 105,946 $ 3,522,258 $ 499,231 Derivative liabilities $ 357,170 $ — $ 357,170 $ — December 31, 2021 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 52,507 — 52,507 — Municipal 165,594 — 59,907 105,687 Corporate notes 95,704 — 95,704 — Mortgage-backed 2,013,988 — 2,013,988 — Trading account securities 1,061 — 1,061 — Equity securities with readily determinable fair value 90,511 82,445 8,066 — Mortgage loans held-for-sale 817,912 — 817,912 — Loans held-for-investment 38,598 — 22,707 15,891 MSRs 147,571 — — 147,571 Nonqualified deferred compensation assets 16,240 — 16,240 — Derivative assets 165,008 — 154,448 10,560 Total $ 3,604,694 $ 82,445 $ 3,242,540 $ 279,709 Derivative liabilities $ 123,000 $ — $ 123,000 $ — September 30, 2021 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ 6,000 $ 6,000 $ — $ — U.S. government agencies 53,275 — 53,275 — Municipal 174,600 — 56,876 117,724 Corporate notes 99,118 — 99,118 — Mortgage-backed 2,040,485 — 2,040,485 — Trading account securities 1,103 — 1,103 — Equity securities with readily determinable fair value 88,193 80,127 8,066 — Mortgage loans held-for-sale 925,312 — 925,312 — Loans held-for-investment 30,979 — 18,847 12,132 MSRs 133,552 — — 133,552 Nonqualified deferred compensation assets 15,797 — 15,797 — Derivative assets 191,612 — 177,000 14,612 Total $ 3,760,026 $ 86,127 $ 3,395,879 $ 278,020 Derivative liabilities $ 161,314 $ — $ 161,314 $ — The aggregate remaining contractual principal balance outstanding as of September 30, 2022, December 31, 2021 and September 30, 2021 for mortgage loans held-for-sale measured at fair value under ASC 825 was $394.0 million, $801.6 million and $900.8 million, respectively, while the aggregate fair value of mortgage loans held-for-sale was $376.2 million, $817.9 million and $925.3 million, for the same respective periods, as shown in the above tables. At September 30, 2022, $5.9 million of mortgage loans held-for-sale were classified as nonaccrual. Additionally, there were $34.7 million of loans past due greater than 90 days and still accruing in the mortgage loans held-for-sale portfolio as of September 30, 2022 compared to $125.5 million as of December 31, 2021 and $122.6 million as of September 30, 2021. All of the nonaccrual loans and loans past due greater than 90 days and still accruing as of September 30, 2022 were individual delinquent mortgage loans bought back from GNMA at the unconditional option of the Company as servicer for those loans. The changes in Level 3 assets measured at fair value on a recurring basis during the three and nine months ended September 30, 2022 and 2021 are summarized as follows: Mortgage loans held-for-sale U.S. Government agencies Loans held-for- investment Mortgage Derivative assets (In thousands) Municipal Balance at July 1, 2022 $ 113,485 $ 88,963 $ — $ 84,798 $ 212,664 $ 6,649 Total net (losses) gains included in: Net income (1) — (787) — (1,574) 17,007 (6,508) Other comprehensive income or loss (2,618) — — — — — Purchases 11,590 — — — — — Issuances — — — — — — Sales — — — — — — Settlements (25) (27,512) — (12,986) — — Net transfers (out of)/into Level 3 — (12,244) — 28,329 — — Balance at September 30, 2022 $ 122,432 $ 48,420 $ — $ 98,567 $ 229,671 $ 141 Mortgage loans held-for-sale U.S. Government agencies Loans held-for- investment Mortgage Derivative assets (In thousands) Municipal Balance at July 1, 2021 $ 117,606 $ — $ — $ 11,007 $ 127,604 $ 22,570 Total net gains (losses) included in: Net income (1) — — — 54 5,948 (7,958) Other comprehensive income or loss (757) — — — — Purchases 875 — — — — — Issuances — — — — — — Sales — — — — — — Settlements — — — (588) — — Net transfers into Level 3 — — — 1,659 — — Balance at September 30, 2021 $ 117,724 $ — $ — $ 12,132 $ 133,552 $ 14,612 (1) Changes in the balance of MSRs, mortgage loans held-for-sale and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income. Mortgage loans held-for-sale U.S. Government Agencies Loans held-for- investment Mortgage Derivative Assets (In thousands) Municipal Balance at January 1, 2022 $ 105,687 $ — $ — $ 15,891 $ 147,571 $ 10,560 Total net (losses) gains included in: Net income (1) — (3,687) — (4,121) 82,100 (10,419) Other comprehensive income or loss (8,752) — — — — — Purchases 28,333 — — — — — Issuances — — — — — — Sales — — — — — — Settlements (2,836) (27,512) — (21,884) — — Net transfers into Level 3 — 79,619 — 108,681 — — Balance at September 30, 2022 $ 122,432 $ 48,420 $ — $ 98,567 $ 229,671 $ 141 Mortgage loans held-for-sale U.S. Government Agencies Loans held-for- investment Mortgage Derivative Assets (In thousands) Municipal Balance at January 1, 2021 $ 109,876 $ — $ 1,966 $ 10,280 $ 92,081 $ 48,091 Total net (losses) gains included in: Net income (1) — — (4) (309) 41,471 (33,479) Other comprehensive income or loss (3,199) — (24) — — — Purchases 19,038 — — — — — Issuances — — — — — — Sales — — — — — — Settlements (7,991) — (1,938) (4,565) — — Net transfers into Level 3 — — — 6,726 — — Balance at September 30, 2021 $ 117,724 $ — $ — $ 12,132 $ 133,552 $ 14,612 (1) Changes in the balance of MSRs and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income. Also, the Company may be required, from time to time, to measure certain other assets at fair value on a non-recurring basis in accordance with GAAP. These adjustments to fair value usually result from impairment charges on individual assets. For assets measured at fair value on a non-recurring basis that were still held in the balance sheet at the end of the period, the following table provides the carrying value of the related individual assets or portfolios at September 30, 2022: September 30, 2022 Three Months Ended September 30, 2022 Fair Value Losses Recognized, net Nine Months Ended September 30, 2022 Fair Value Losses Recognized, net (In thousands) Total Level 1 Level 2 Level 3 Individually assessed loans - foreclosure probable and collateral-dependent $ 81,889 $ — $ — $ 81,889 $ 837 $ 12,878 Other real estate owned (1) 6,687 — — 6,687 153 435 Total $ 88,576 $ — $ — $ 88,576 $ 990 $ 13,313 (1) Fair value losses recognized, net on other real estate owned include valuation adjustments and charge-offs during the respective period. Individually assessed loans —In accordance with ASC 326, the allowance for credit losses for loans and other financial assets held at amortized cost should be measured on a collective or pooled basis when such assets exhibit similar risk characteristics. In instances in which a financial asset does not exhibit similar risk characteristics to a pool, the Company is required to measure such allowance for credit losses on an individual asset basis. For the Company’s loan portfolio, nonaccrual loans and TDRs are considered to not exhibit similar risk characteristics as pools and thus are individually assessed. Credit losses are measured by estimating the fair value of the loan based on the present value of expected cash flows, the market price of the loan, or the fair value of the underlying collateral. Individually assessed loans are considered a fair value measurement where an allowance for credit loss is established based on the fair value of collateral. Appraised values on relevant real estate properties, which may require adjustments to market-based valuation inputs, are generally used on foreclosure probable and collateral-dependent loans within the real estate portfolios. The Company’s Managed Assets Division is primarily responsible for the valuation of Level 3 inputs of individually assessed loans. For more information on individually assessed loans refer to Note 7 – Allowance for Credit Losses. At September 30, 2022, the Company had $105.4 million of individually assessed loans classified as Level 3. Of the $105.4 million of individually assessed loans, $81.9 million were measured at fair value based on the underlying collateral of the loan as shown in the table above. The remaining $23.5 million were valued based on discounted cash flows in accordance with ASC 310. Other real estate owned —Other real estate owned is comprised of real estate acquired in partial or full satisfaction of loans and is included in other assets. Other real estate owned is recorded at its estimated fair value less estimated selling costs at the date of transfer, with any excess of the related loan balance over the fair value less expected selling costs charged to the allowance for loan losses. Subsequent changes in value are reported as adjustments to the carrying amount and are recorded in other non-interest expense. Gains and losses upon sale, if any, are also charged to other non-interest expense. Fair value is generally based on third party appraisals and internal estimates that are adjusted by a discount representing the estimated cost of sale and is therefore considered a Level 3 valuation. The Company’s Managed Assets Division is primarily responsible for the valuation of Level 3 inputs for other real estate owned. At September 30, 2022, the Company had $6.7 million of other real estate owned classified as Level 3. The unobservable input applied to other real estate owned relates to the 10% reduction to the appraisal value representing the estimated cost of sale of the foreclosed property. A higher discount for the estimated cost of sale results in a decreased carrying value. The valuation techniques and significant unobservable inputs used to measure both recurring and non-recurring Level 3 fair value measurements at September 30, 2022 were as follows: (Dollars in thousands) Fair Value Valuation Methodology Significant Unobservable Input Range Weighted Impact to valuation Measured at fair value on a recurring basis: Municipal securities $ 122,432 Bond pricing Equivalent rating BBB-AA+ N/A Increase Mortgage loans held-for-sale 48,420 Discounted cash flows Discount rate 6.19% 6.19% Decrease Credit discount 0% - 14% 0.23% Decrease Loans held-for-investment 98,567 Discounted cash flows Discount rate 6.00% - 6.50% 6.21% Decrease Credit discount 0% - 35% 0.61% Decrease Constant prepayment rate (CPR) - current loans 6.49% 6.49% Decrease Average life - delinquent loans (in years) 1 year - 13 years 5.5 years Decrease MSRs 229,671 Discounted cash flows Discount rate 8% - 20% 10.29% Decrease Constant prepayment rate (CPR) 0% - 90% 6.49% Decrease Cost of servicing $70 - $200 $ 75 Decrease Cost of servicing - delinquent $200 - 1,250 $ 371 Decrease Derivatives 141 Discounted cash flows Pull-through rate 2% - 100% 85.48 % Increase Measured at fair value on a non-recurring basis: Individually assessed loans - foreclosure probable and collateral-dependent 81,889 Appraisal value Appraisal adjustment - cost of sale 10% 10.00% Decrease Other real estate owned 6,687 Appraisal value Appraisal adjustment - cost of sale 10% 10.00% Decrease The Company is required under applicable accounting guidance to report the fair value of all financial instruments on the Consolidated Statements of Condition, including those financial instruments carried at cost. The table below presents the carrying amounts and estimated fair values of the Company’s financial instruments as of the dates shown At September 30, 2022 At December 31, 2021 At September 30, 2021 Carrying Fair Carrying Fair Carrying Fair (In thousands) Value Value Value Value Value Value Financial Assets: Cash and cash equivalents $ 489,647 $ 489,647 $ 411,205 $ 411,205 $ 462,299 $ 462,299 Securities sold under agreements to repurchase with original maturities exceeding three months — — 700,000 700,000 — — Interest-bearing deposits with banks 3,968,605 3,968,605 5,372,603 5,372,603 5,232,315 5,232,315 Available-for-sale securities 2,923,653 2,923,653 2,327,793 2,327,793 2,373,478 2,373,478 Held-to-maturity securities 3,389,842 2,679,326 2,942,285 2,900,694 2,736,722 2,699,480 Trading account securities 179 179 1,061 1,061 1,103 1,103 Equity securities with readily determinable fair value 114,012 114,012 90,511 90,511 88,193 88,193 FHLB and FRB stock, at cost 178,156 178,156 135,378 135,378 135,408 135,408 Brokerage customer receivables 20,327 20,327 26,068 26,068 26,378 26,378 Mortgage loans held-for-sale, at fair value 376,160 376,160 817,912 817,912 925,312 925,312 Loans held-for-investment, at fair value 156,893 156,893 38,598 38,598 30,979 30,979 Loans held-for-investment, at amortized cost 38,010,720 37,224,753 34,750,506 35,297,878 33,233,064 33,276,688 Nonqualified deferred compensation assets 13,387 13,387 16,240 16,240 15,797 15,797 Derivative assets 313,480 313,480 165,008 165,008 191,612 191,612 Accrued interest receivable and other 317,142 317,142 268,921 268,921 272,293 272,293 Total financial assets $ 50,272,203 $ 48,775,720 $ 48,064,089 $ 48,569,870 $ 45,724,953 $ 45,731,335 Financial Liabilities Non-maturity deposits $ 38,720,873 $ 38,720,873 $ 38,126,796 $ 38,126,796 $ 35,822,012 $ 35,822,012 Deposits with stated maturities 4,076,318 4,087,196 3,968,789 3,965,372 4,130,546 4,124,199 FHLB advances 2,316,071 2,230,921 1,241,071 1,186,280 1,241,071 1,164,168 Other borrowings 447,215 447,971 494,136 494,670 504,527 504,527 Subordinated notes 437,260 417,363 436,938 472,684 436,811 474,171 Junior subordinated debentures 253,566 285,238 253,566 212,226 253,566 207,675 Derivative liabilities 357,170 357,170 123,000 123,000 161,314 161,314 Accrued interest payable 18,479 18,479 9,304 9,304 15,030 15,030 Total financial liabilities $ 46,626,952 $ 46,565,211 $ 44,653,600 $ 44,590,332 $ 42,564,877 $ 42,473,096 Not all the financial instruments listed in the table above are subject to the disclosure provisions of ASC Topic 820, as certain assets and liabilities result in their carrying value approximating fair value. These include cash and cash equivalents, interest-bearing deposits with banks, brokerage customer receivables, FHLB and FRB stock, accrued interest receivable and accrued interest payable and non-maturity deposits. The following methods and assumptions were used by the Company in estimating fair values of financial instruments that were not previously disclosed. Held-to-maturity securities. Held-to-maturity securities include U.S. government-sponsored agency securities, municipal bonds issued by various municipal government entities primarily located in the Chicago metropolitan area and southern Wisconsin and mortgage-backed securities. Fair values for held-to-maturity securities are typically based on prices obtained from independent pricing vendors. In accordance with ASC 820, the Company has generally categorized these held-to-maturity securities as a Level 2 fair value measurement. Fair values for certain other held-to-maturity securities are based on the bond pricing methodology discussed previously related to certain available-for-sale securities. In accordance with ASC 820, the Company has categorized these held-to-maturity securities as a Level 3 fair value measurement. Loans held-for-investment, at amortized cost. Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are analyzed by type such as commercial, residential real estate, etc. Each category is further segmented by interest rate type (fixed and variable) and term. For variable-rate loans that reprice frequently, estimated fair values are based on carrying values. The fair value of residential loans is based on secondary market sources for securities backed by similar loans, adjusted for differences in loan characteristics. The fair value for other fixed rate loans is estimated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect credit and interest rate risks inherent in the loan. In accordance with ASC 820, the Company has categorized loans as a Level 3 fair value measurement. Deposits with stated maturities. The fair value of certificates of deposit is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently in effect for deposits of similar remaining maturities. In accordance with ASC 820, the Company has categorized deposits with stated maturities as a Level 3 fair value measurement. FHLB advances. The fair value of FHLB advances is obtained from the FHLB which uses a discounted cash flow analysis based on current market rates of similar maturity debt securities to discount cash flows. In accordance with ASC 820, the Company has categorized FHLB advances as a Level 3 fair value measurement. Subordinated notes. The fair value of the subordinated notes is based on a market price obtained from an independent pricing vendor. In accordance with ASC 820, the Company has categorized subordinated notes as a Level 2 fair value measurement.

Stock-Based Compensation Plans

Stock-Based Compensation Plans	9 Months Ended
	Sep. 30, 2022
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Stock-Based Compensation Plans	Stock-Based Compensation Plans In May 2022, the Company’s shareholders approved the 2022 Stock Incentive Plan (“the 2022 Plan”) which provides for the issuance of up to 1,200,000 shares of common stock plus any shares of common stock that were available for awards under the 2015 Stock Incentive Plan (“the 2015 Plan”) as of the effective date of the 2022 Plan. The 2022 Plan replaced the 2015 Plan, and similarly, the 2015 Plan replaced the 2007 Stock Incentive Plan (“the 2007 Plan”) and the 2007 Plan replaced the 1997 Stock Incentive Plan (“the 1997 Plan”). The 2022 Plan, 2015 Plan, 2007 Plan and 1997 Plan are collectively referred to as “the Plans.” The 2022 Plan has substantially similar terms to the predecessor plans. Awards granted under the Plans for which common shares are not issued by reason of cancellation, forfeiture, lapse of such award or settlement of such award in cash, are again available under the 2022 Plan. All grants made after the approval of the 2022 Plan are made pursuant to the 2022 Plan. As of September 30, 2022, approximately 1,597,000 shares were available for future grants, assuming the maximum number of shares are issued for the performance awards outstanding. The Plans cover substantially all employees of Wintrust. The Compensation Committee of the Board of Directors administers all stock-based compensation programs and authorizes all awards granted pursuant to the Plans. The Plans permit the grant of incentive stock options, non-qualified stock options, stock appreciation rights, stock awards, restricted share or unit awards, performance awards and other incentive awards valued in whole or in part by reference to the Company’s common stock, all on a stand-alone, combination or tandem basis. The Company historically awarded stock-based compensation in the form of time-vested non-qualified stock options and time-vested restricted share unit awards (“restricted shares”). The grants of options provide for the purchase of shares of the Company’s common stock at the fair market value of the stock on the date the options are granted. Stock options generally vest ratably over periods of three one Beginning in 2011, the Company has awarded annual grants under the Long-Term Incentive Program (“LTIP”), which is administered under the Plans. The LTIP is designed in part to align the interests of management with the interests of shareholders, foster retention, create a long-term focus based on sustainable results and provide participants with a target long-term incentive opportunity. LTIP grants in 2022 and 2021 consisted of a combination of performance-based stock awards with a performance condition metric, performance-based stock awards with a market condition metric and time-vested restricted shares, and in 2020 consisted of a combination of performance-based stock awards and performance-based cash awards (both with a performance condition metric) and time-vested restricted shares. LTIP grants from 2017 through 2019 consisted of a combination of performance-based stock awards and performance-based cash awards, and prior to 2017, nonqualified stock options were in the mix of award types. Stock options granted under the LTIP have a term of seven years and generally vested equally over three years based on continued service. Performance-based stock and cash awards granted under the LTIP are contingent upon the achievement of pre-established long-term performance goals set in advance by the Compensation Committee over a three-year period starting at the beginning of each calendar year. Performance-based stock awards with a market condition metric are contingent on the total shareholder return performance over a three-year period starting at the beginning of each calendar year relative to the KBW Regional Bank Index. These performance awards are granted at a target level, and based on the Company’s achievement of the pre-established long-term goals, the actual payouts can range from 0% to a maximum of 150% of the target award. The awards typically vest in the quarter after the end of the performance period upon certification of the payout by the Compensation Committee of the Board of Directors. Holders of performance-based stock awards are entitled to receive, at no cost, the shares earned based on the achievement of the pre-established long-term goals. Holders of restricted share awards and performance-based stock awards received under the Plans are not entitled to vote or receive cash dividends (or cash payments equal to the cash dividends) on the underlying common shares until the awards are vested and shares are issued. Shares that are vested but not issuable pursuant to deferred compensation arrangements accrue additional shares based on the value of dividends otherwise paid. Except in limited circumstances, these awards are canceled upon termination of employment without any payment of consideration by the Company. Stock-based compensation is measured as the fair value of an award on the date of grant, and the measured cost is recognized over the period which the recipient is required to provide service in exchange for the award. The fair value of restricted share and performance-based stock awards with a performance condition metric is determined based on the average of the high and low trading prices on the grant date. The fair value of performance stock awards with a market condition metric is estimated using a Monte Carlo simulation model and the fair value of stock options is estimated using a Black-Scholes option-pricing model. The Monte Carlo simulation model and the Black-Scholes option-pricing model require the input of highly subjective assumptions and are sensitive to changes in the award's expected life and the price volatility of the underlying stock, which can materially affect the fair value estimates. Management periodically reviews and adjusts the assumptions used to calculate the fair value of such awards when granted. No options have been granted since 2016. Stock based compensation is recognized based upon the number of awards that are ultimately expected to vest, taking into account expected forfeitures. In addition, for performance-based awards with a performance metric, an estimate is made of the number of shares expected to vest as a result of actual performance against the performance criteria in the award to determine the amount of compensation expense to recognize. The estimate is re-evaluated quarterly and total compensation expense is adjusted for any change in estimate in the current period. Stock-based compensation expense recognized in the Consolidated Statements of Income was $9.0 million in the third quarter of 2022 and $3.2 million in the third quarter of 2021, and $23.9 million and $9.4 million in the nine month periods ended September 30, 2022 and 2021, respectively. A summary of the Company’s stock option activity for the nine months ended September 30, 2022 and September 30, 2021 is presented below: Stock Options Common Weighted Remaining Contractual Term (1) Intrinsic Value (2) (in thousands) Outstanding at January 1, 2022 193,447 $ 41.62 Granted — — Exercised (88,355) 42.30 Forfeited or canceled (1,430) 40.87 Outstanding at September 30, 2022 103,662 $ 41.04 1.0 $ 4,199 Exercisable at September 30, 2022 103,662 $ 41.04 1.0 $ 4,199 Stock Options Common Weighted Remaining Contractual Term (1) Intrinsic Value (2) (in thousands) Outstanding at January 1, 2021 520,663 $ 42.47 Granted — — Exercised (245,286) 43.05 Forfeited or canceled (590) 46.86 Outstanding at September 30, 2021 274,787 $ 41.95 1.4 $ 10,557 Exercisable at September 30, 2021 273,238 $ 41.92 1.4 $ 10,506 (1) Represents the remaining weighted average contractual life in years. (2) Aggregate intrinsic value represents the total pre-tax intrinsic value (i.e., the difference between the Company’s stock price on the last trading day of the quarter and the option exercise price, multiplied by the number of shares) that would have been received by the option holders if they had exercised their options on the last day of the quarter. Options with exercise prices above the stock price on the last trading day of the quarter are excluded from the calculation of intrinsic value. The intrinsic value will change based on the fair market value of the Company’s stock. The aggregate intrinsic value of options exercised during the nine months ended September 30, 2022 and September 30, 2021, was $4.9 million and $7.9 million, respectively. Cash received from option exercises under the Plans for the nine months ended September 30, 2022 and September 30, 2021 was $3.7 million and $10.6 million, respectively. A summary of the Plans’ restricted share activity for the nine months ended September 30, 2022 and September 30, 2021 is presented below: Nine months ended September 30, 2022 Nine months ended September 30, 2021 Restricted Shares Common Weighted Common Weighted Outstanding at January 1 476,813 $ 61.33 234,794 $ 59.02 Granted 223,559 95.98 268,429 63.22 Vested and issued (61,333) 63.85 (13,120) 72.01 Forfeited or canceled (18,632) 75.26 (12,624) 63.55 Outstanding at September 30 620,407 $ 73.15 477,479 $ 60.90 Vested, but deferred, at September 30 96,554 $ 52.94 95,215 $ 52.39 A summary of the Plans’ performance-based stock award activity, based on the target level of the awards, for the nine months ended September 30, 2022 and September 30, 2021 is presented below: Nine months ended September 30, 2022 Nine months ended September 30, 2021 Performance-based Stock Common Weighted Common Weighted Outstanding at January 1 557,255 $ 62.94 482,608 $ 71.15 Granted 160,463 97.15 208,732 58.97 Vested and issued — — — — Forfeited or canceled (172,001) 71.51 (132,998) 86.51 Outstanding at September 30 545,717 $ 70.30 558,342 $ 62.94 Vested, but deferred, at September 30 35,561 $ 44.21 35,040 $ 43.53

Shareholders' Equity and Earnin

Shareholders' Equity and Earnings Per Share	9 Months Ended
	Sep. 30, 2022
Equity [Abstract]
Shareholders' Equity and Earnings Per Share	Shareholders’ Equity and Earnings Per Share Common Stock Offering In June 2022, the Company sold a total of 3,450,000 shares of its common stock through a public offering. Net proceeds to the Company totaled approximately $285.7 million, net of estimated issuance costs. Series D Preferred Stock In June 2015, the Company issued and sold 5,000,000 shares of fixed-to-floating rate non-cumulative perpetual preferred stock, Series D, liquidation preference $25 per share (the “Series D Preferred Stock”) for $125.0 million in a public offering. When, as and if declared, dividends on the Series D Preferred Stock are payable quarterly in arrears at a fixed rate of 6.50% per annum from the original issuance date to, but excluding, July 15, 2025, and from (and including) that date at a floating rate equal to three-month LIBOR plus a spread of 4.06% per annum. Series E Preferred Stock In May 2020, the Company issued 11,500 shares of fixed-rate reset non-cumulative perpetual preferred stock, Series E, liquidation preference $25,000 per share (the “Series E Preferred Stock”) as part of a $287.5 million public offering of 11,500,000 depositary shares, each representing a 1/1,000th interest in a share of Series E Preferred Stock. When, as and if declared, dividends on the Series E Preferred Stock are payable quarterly in arrears at a fixed rate of 6.875% per annum from October 15, 2020 to, but excluding, July 15, 2025, and from (and including) July 15, 2025 at a floating rate equal to the Five-Year Treasury Rate (as defined in the certificate of designations for the Series E Preferred Stock) plus 6.507%. Other At the January 2022 meeting of the board of directors of the Company (the “Board of Directors”), a quarterly cash dividend of $0.34 per share ($1.36 on an annualized basis) was declared. It was paid on February 24, 2022 to shareholders of record as of February 10, 2022. At the April 2022 Board of Directors meeting, a quarterly cash dividend of $0.34 per share ($1.36 on an annualized basis) was declared. It was paid on May 26, 2022 to shareholders of record as of May 12, 2022. At the July 2022 Board of Directors meeting, a quarterly cash dividend of $0.34 per share ($1.36 on an annualized basis) was declared. It was paid on August 25, 2022 to shareholders of record as of August 11, 2022. Accumulated Other Comprehensive Income or Loss The following tables summarize the components of other comprehensive income or loss, including the related income tax effects, and the related amount reclassified to net income for the periods presented (in thousands). Accumulated Accumulated Accumulated Total Balance at July 1, 2022 $ (264,790) $ 57,801 $ (36,048) $ (243,037) Other comprehensive loss during the period, net of tax, before reclassifications (141,758) (52,072) (17,822) (211,652) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (9) (3,998) — (4,007) Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax (32) — — (32) Net other comprehensive loss during the period, net of tax $ (141,799) $ (56,070) $ (17,822) $ (215,691) Balance at September 30, 2022 $ (406,589) $ 1,731 $ (53,870) $ (458,728) Balance at January 1, 2022 $ 8,724 $ 27,111 $ (31,743) $ 4,092 Other comprehensive loss during the period, net of tax, before reclassifications (415,026) (26,050) (22,127) (463,203) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (192) 670 — 478 Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax (95) — — (95) Net other comprehensive loss during the period, net of tax $ (415,313) $ (25,380) $ (22,127) $ (462,820) Balance at September 30, 2022 $ (406,589) $ 1,731 $ (53,870) $ (458,728) Balance at July 1, 2021 $ 30,189 $ 7,720 $ (27,776) $ 10,133 Other comprehensive (loss) income during the period, net of tax, before reclassifications (10,374) 1,631 (4,650) (13,393) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (256) 4,973 — 4,717 Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax (40) — — (40) Net other comprehensive (loss) income during the period, net of tax $ (10,670) $ 6,604 $ (4,650) $ (8,716) Balance at September 30, 2021 $ 19,519 $ 14,324 $ (32,426) $ 1,417 Balance at January 1, 2021 $ 70,737 $ (23,090) $ (32,265) $ 15,382 Other comprehensive (loss) income during the period, net of tax, before reclassifications (50,265) 22,493 (161) (27,933) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (837) 14,921 — 14,084 Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax (116) — — (116) Net other comprehensive (loss) income during the period, net of tax $ (51,218) $ 37,414 $ (161) $ (13,965) Balance at September 30, 2021 $ 19,519 $ 14,324 $ (32,426) $ 1,417 Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the Details Regarding the Component of Accumulated Other Comprehensive Income or Loss Three Months Ended Nine Months Ended Impacted Line on the September 30, September 30, 2022 2021 2022 2021 Accumulated unrealized (losses) gains on securities Gains included in net income $ 12 $ 350 $ 262 $ 1,144 (Losses) gains on investment securities, net 12 350 262 1,144 Income before taxes Tax effect (3) (94) (70) (307) Income tax expense Net of tax $ 9 $ 256 $ 192 $ 837 Net income Accumulated unrealized gains on derivative instruments Amount reclassified to interest expense on deposits $ (5,563) $ 4,947 $ (87) $ 14,898 Interest on deposits Amount reclassified to interest expense on other borrowings 112 636 1,001 1,958 Interest on other borrowings Amount reclassified to interest expense on junior subordinated debentures — 1,197 — 3,486 Interest on junior subordinated debentures 5,451 (6,780) (914) (20,342) Income before taxes Tax effect (1,453) 1,807 244 5,421 Income tax expense Net of tax $ 3,998 $ (4,973) $ (670) $ (14,921) Net income Earnings per Share The following table shows the computation of basic and diluted earnings per share for the periods indicated: Three Months Ended Nine Months Ended (In thousands, except per share data) September 30, September 30, September 30, September 30, Net income $ 142,961 $ 109,137 $ 364,865 $ 367,394 Less: Preferred stock dividends 6,991 6,991 20,973 20,973 Net income applicable to common shares (A) $ 135,970 $ 102,146 $ 343,892 $ 346,421 Weighted average common shares outstanding (B) 60,738 57,000 58,679 56,985 Effect of dilutive potential common shares Common stock equivalents 837 753 814 728 Weighted average common shares and effect of dilutive potential common shares (C) 61,575 57,753 59,493 57,713 Net income per common share: Basic (A/B) $ 2.24 $ 1.79 $ 5.86 $ 6.08 Diluted (A/C) $ 2.21 $ 1.77 $ 5.78 $ 6.00 Potentially dilutive common shares can result from stock options, restricted stock unit awards, stock warrants and shares to be issued under the Employee Stock Purchase Plan and the Directors Deferred Fee and Stock Plan, being treated as if they had been either exercised or issued, computed by application of the treasury stock method. While potentially dilutive common shares are typically included in the computation of diluted earnings per share, potentially dilutive common shares are excluded from this computation in periods in which the effect of inclusion would either reduce the loss per share or increase the income per share.

Recent Accounting Developments

Recent Accounting Developments (Policies)	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Basis of Accounting	The interim consolidated financial statements of Wintrust Financial Corporation and its subsidiaries (collectively, “Wintrust” or the “Company”) presented herein are unaudited, but in the opinion of management, reflect all necessary adjustments of a normal or recurring nature for a fair presentation of results as of the dates and for the periods covered by the interim consolidated financial statements. The accompanying interim consolidated financial statements are unaudited and do not include information or footnotes necessary for a complete presentation of financial condition, results of operations or cash flows in accordance with U.S. generally accepted accounting principles (“GAAP”). The interim unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 (“2021 Form 10-K”). Operating results reported for the period are not necessarily indicative of the results which may be expected for the entire year. Reclassifications of certain prior period amounts have been made to conform to the current period presentation. The preparation of the financial statements requires management to make estimates, assumptions and judgments that affect the reported amounts of assets and liabilities. Management believes that the estimates made are reasonable; however, changes in estimates may be required if economic or other conditions develop differently from management’s expectations. Certain policies and accounting principles inherently have a greater reliance on the use of estimates, assumptions and judgments and as such have a greater possibility of producing results that could be materially different than originally reported. Management views critical accounting policies to be those which are highly dependent on subjective or complex judgments, estimates and assumptions, and where changes in those estimates and assumptions could have a significant impact on the financial statements. Management currently views the determination of the allowance for credit losses, including the allowance for loan losses, the allowance for unfunded commitment losses and the allowance for held-to-maturity securities losses, estimations of fair value, the valuations required for impairment testing of goodwill, the valuation and accounting for derivative instruments and income taxes as the accounting areas that require the most subjective and complex judgments, and as such could be the most subject to revision as new information becomes available. Descriptions of the Company’s significant accounting policies are included in Note 1 - Summary of Significant Accounting Policies of the 2021 Form 10-K. In preparation of these financial statements, subsequent events were evaluated through the time the financial statements were issued. Financial statements are considered issued when they are widely distributed to all shareholders and other financial statement users or filed with the SEC.
Recent Accounting Developments	Debt In August 2020, the FASB issued ASU No. 2020-06, “Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity,” which includes provisions for reducing the number of accounting models used in accounting for convertible debt instruments and convertible preferred stock, amending derivatives and earnings-per-share (EPS) guidance and expanding disclosures for convertible debt instruments and EPS. The Company adopted ASU No. 2020-06 as of January 1, 2022. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Issuer’s Accounting for Modifications or Exchanges of Freestanding Equity-Classified Written Call Options In May 2021, the FASB issued ASU No. 2021-04, “Earnings Per Share (Topic 260), Debt—Modifications and Extinguishments (Subtopic 470-50), Compensation—Stock Compensation (Topic 718), and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Issuer’s Accounting for Certain Modifications or Exchanges of Freestanding Equity-Classified Written Call Options,” which requires an issuer to account for any modification or exchange of the terms or conditions of a freestanding written call option classified as equity, such as warrants, that remains classified as equity as an exchange of the original instrument for a new instrument and provides a framework for measuring and recognizing the effect of the exchange as an adjustment to either equity or expense. The Company adopted ASU No. 2021-04 as of January 1, 2022 under a prospective approach. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Leases - Certain Leases with Variable Lease Payments In July 2021, the FASB issued ASU No. 2021-05, “Leases (Topic 842): Lessors – Certain Leases with Variable Lease Payments” which amends lessor lease classification requirements to allow leases with variable lease payments that are not dependent on a reference index or rate to be classified and accounted for as an operating lease, provided the lease would have been classified as a sales-type or direct financing lease and the lessor would have otherwise recognized a day-one loss. The Company adopted ASU No. 2021-05 as of January 1, 2022. As the Company has adopted ASC Topic 842, this guidance was applied retrospectively to leases that commenced or were modified after the adoption of ASC Topic 842 and prospectively to leases that will commence or be modified after January 1, 2022. Adoption of this standard did not have a material impact on the Company’s consolidated financial statements. Fair Value Hedging - Portfolio Layer Method In March 2022, the FASB issued ASU No. 2022-01, “Derivatives and Hedging (Topic 815): Fair Value Hedging - Portfolio Layer Method” which expands the current last-of-layer method by allowing multiple hedged layers to be designated for a single closed portfolio of financial assets or one or more beneficial interests secured by a portfolio of financial instruments. This guidance is effective for fiscal years beginning after December 15, 2022, including interim periods therein, and is to be applied under a prospective approach. Early adoption is permitted. The Company is currently evaluating the impact of the updated guidance on the Company’s consolidated financial statements. Troubled Debt Restructurings and Vintage Disclosures In March 2022, the FASB issued ASU No. 2022-02, “Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures” which eliminates the separate recognition and measurement guidance for Troubled Debt Restructurings ("TDRs") by creditors, while enhancing disclosure requirements for certain loan refinancing and restructurings by creditors when a borrower is experiencing financial difficulty, and requiring entities to disclose current-period gross write-offs by year of origination for certain financing receivables and net investments in leases. This guidance is effective for fiscal years beginning after December 15, 2022, including interim periods therein, with early adoption permitted. If the Company elects to early adopt in an interim period, the guidance should be applied as of the beginning of the fiscal year that includes the interim period. The Company may elect to early adopt the amendments related to TDRs separately from the amendments related to vintage disclosures. The amendments related to disclosures for loan modifications and the vintage disclosures should be applied under a prospective approach, while the guidance on TDRs should be applied using either a prospective or modified retrospective approach. The Company is currently evaluating the impact of the updated guidance on the Company’s consolidated financial statements and plans to adopt the new guidance as of January 1, 2023. Fair Value Measurement - Equity Securities with Contractual Sale Restrictions
Cash and Cash Equivalents	For purposes of the Consolidated Statements of Cash Flows, the Company considers cash and cash equivalents to include cash on hand, cash items in the process of collection, non-interest bearing amounts due from correspondent banks, federal funds sold and securities purchased under resale agreements with original maturities of three months or less. These items are included within the Company’s Consolidated Statements of Condition as cash and due from banks, and federal funds sold and securities purchased under resale agreements.

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Schedule of Investment Securities	The following tables are a summary of the investment securities portfolios as of the dates shown: September 30, 2022 (In thousands) Amortized Gross Gross Fair Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 50,000 — (5,987) 44,013 Municipal 181,612 127 (7,738) 174,001 Corporate notes: Financial issuers 93,994 — (7,951) 86,043 Other 1,000 — (10) 990 Mortgage-backed: (1) Mortgage-backed securities 3,052,778 — (513,978) 2,538,800 Collateralized mortgage obligations 98,922 — (19,116) 79,806 Total available-for-sale securities $ 3,478,306 $ 127 $ (554,780) $ 2,923,653 Held-to-maturity securities U.S. government agencies $ 314,618 $ — $ (72,723) $ 241,895 Municipal 180,304 203 (7,791) 172,716 Mortgage-backed: (1) Mortgage-backed securities 2,679,862 — (600,335) 2,079,527 Collateralized mortgage obligations 166,965 — (24,475) 142,490 Corporate notes 48,403 — (5,705) 42,698 Total held-to-maturity securities $ 3,390,152 $ 203 $ (711,029) $ 2,679,326 Less: Allowance for credit losses (310) Held-to-maturity securities, net of allowance for credit losses $ 3,389,842 Equity securities with readily determinable fair value $ 120,073 $ 2,233 $ (8,294) $ 114,012 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime. December 31, 2021 Amortized Gross Gross Fair (In thousands) Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 50,158 2,349 — 52,507 Municipal 161,618 4,193 (217) 165,594 Corporate notes: Financial issuers 96,878 418 (2,599) 94,697 Other 1,000 7 — 1,007 Mortgage-backed: (1) Mortgage-backed securities 1,901,005 32,830 (25,854) 1,907,981 Collateralized mortgage obligations 105,710 297 — 106,007 Total available-for-sale securities $ 2,316,369 $ 40,094 $ (28,670) $ 2,327,793 Held-to-maturity securities U.S. government agencies $ 180,192 $ 201 $ (3,314) $ 177,079 Municipal 187,486 9,544 (223) 196,807 Mortgage-backed: (1) Mortgage-backed securities 2,530,730 864 (47,622) 2,483,972 Collateralized mortgage obligations — — — — Corporate notes 43,955 — (1,119) 42,836 Total held-to-maturity securities $ 2,942,363 $ 10,609 $ (52,278) $ 2,900,694 Less: Allowance for credit losses (78) Held-to-maturity securities, net of allowance for credit losses $ 2,942,285 Equity securities with readily determinable fair value $ 86,989 $ 5,354 $ (1,832) $ 90,511 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime. September 30, 2021 Amortized Gross Gross Fair (In thousands) Available-for-sale securities U.S. Treasury $ 6,000 $ — $ — $ 6,000 U.S. government agencies 50,163 3,112 — 53,275 Municipal 170,612 4,202 (214) 174,600 Corporate notes: Financial issuers 98,848 500 (1,241) 98,107 Other 1,000 11 — 1,011 Mortgage-backed: (1) Mortgage-backed securities 1,913,139 44,931 (25,434) 1,932,636 Collateralized mortgage obligations 107,657 192 — 107,849 Total available-for-sale securities $ 2,347,419 $ 52,948 $ (26,889) $ 2,373,478 Held-to-maturity securities U.S. government agencies $ 176,143 $ 482 $ (2,878) $ 173,747 Municipal 190,662 10,321 (334) 200,649 Mortgage-backed: (1) Mortgage-backed securities 2,318,309 1,924 (46,102) 2,274,131 Collateralized mortgage obligations — — — — Corporate Notes 51,691 — (738) 50,953 Total held-to-maturity securities $ 2,736,805 $ 12,727 $ (50,052) $ 2,699,480 Less: Allowance for credit losses (83) Held-to-maturity securities, net of allowance for credit losses $ 2,736,722 Equity securities with readily determinable fair value $ 83,909 $ 5,678 $ (1,394) $ 88,193 (1) Consisting entirely of residential mortgage-backed securities, none of which are subprime.
Schedule of Investment Securities Portfolio Continuous Unrealized Loss Position, Available for Sale Debt Securities	The following table presents the portion of the Company’s available-for-sale investment securities portfolios that have gross unrealized losses, reflecting the length of time that individual securities have been in a continuous unrealized loss position at September 30, 2022: Continuous unrealized Continuous unrealized Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available-for-sale securities U.S. government agencies $ 44,013 $ (5,987) $ — $ — $ 44,013 $ (5,987) Municipal 128,642 (5,960) 31,753 (1,778) 160,395 (7,738) Corporate notes: Financial issuers 20,621 (1,379) 65,422 (6,572) 86,043 (7,951) Other 990 (10) — — 990 (10) Mortgage-backed: Mortgage-backed securities 1,847,405 (308,051) 691,395 (205,927) 2,538,800 (513,978) Collateralized mortgage obligations 79,806 (19,116) — — 79,806 (19,116) Total available-for-sale securities $ 2,121,477 $ (340,503) $ 788,570 $ (214,277) $ 2,910,047 $ (554,780)
Schedule of Gross Gains and Gross Losses Realized and Proceeds For Investment Securities	The following table provides information as to the amount of gross gains and losses, adjustments and impairment on investment securities recognized in earnings and proceeds received through the sale or call of investment securities: Three months ended September 30, Nine months ended September 30, (In thousands) 2022 2021 2022 2021 Realized gains on investment securities $ 15 $ 355 $ 280 $ 1,184 Realized losses on investment securities (4) (5) (18) (40) Net realized gains on investment securities 11 350 262 1,144 Unrealized gains on equity securities with readily determinable fair value 45 1 227 2,627 Unrealized losses on equity securities with readily determinable fair value (3,154) (634) (9,809) (1,585) Net unrealized (losses) gains on equity securities with readily determinable fair value (3,109) (633) (9,582) 1,042 Upward adjustments of equity securities without readily determinable fair values — — — — Downward adjustments of equity securities without readily determinable fair values — — — — Impairment of equity securities without readily determinable fair values (5) (2,148) (4,362) (2,178) Adjustment and impairment, net, of equity securities without readily determinable fair values (5) (2,148) (4,362) (2,178) (Losses) gains on investment securities, net $ (3,103) $ (2,431) $ (13,682) $ 8 Proceeds from sales of available-for-sale securities (1) $ — $ 189,851 $ — $ 192,227 Proceeds from sales of equity securities with readily determinable fair value 3,000 3,500 21,753 9,759 Proceeds from sales and capital distributions of equity securities without readily determinable fair value 703 1,330 1,232 2,467 (1) Includes proceeds from available-for-sale securities sold in accordance with written covered call options sold to a third party.
Schedule of Contractual Maturities of Investment Securities	The amortized cost and fair value of available-for-sale and held-to-maturity investment securities as of September 30, 2022, December 31, 2021 and September 30, 2021, by contractual maturity, are shown in the following table. Contractual maturities may differ from actual maturities as borrowers may have the right to call or repay obligations with or without call or prepayment penalties. Mortgage-backed securities are not included in the maturity categories in the following maturity summary as actual maturities may differ from contractual maturities because the underlying mortgages may be called or prepaid without penalties: September 30, 2022 December 31, 2021 September 30, 2021 (In thousands) Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Available-for-sale securities Due in one year or less $ 55,249 $ 54,846 $ 49,714 $ 49,822 $ 45,459 $ 45,549 Due in one to five years 86,555 83,641 72,382 73,850 92,457 94,134 Due in five to ten years 115,949 105,921 118,358 117,573 121,099 121,650 Due after ten years 68,853 60,639 69,200 72,560 67,608 71,660 Mortgage-backed 3,151,700 2,618,606 2,006,715 2,013,988 2,020,796 2,040,485 Total available-for-sale securities $ 3,478,306 $ 2,923,653 $ 2,316,369 $ 2,327,793 $ 2,347,419 $ 2,373,478 Held-to-maturity securities Due in one year or less $ 1,173 $ 1,166 $ 2,976 $ 2,992 $ 5,466 $ 5,493 Due in one to five years 85,423 78,995 79,422 79,705 75,724 76,173 Due in five to ten years 108,703 104,829 106,713 112,667 150,908 157,282 Due after ten years 348,026 272,319 222,522 221,358 186,398 186,401 Mortgage-backed 2,846,827 2,222,017 2,530,730 2,483,972 2,318,309 2,274,131 Total held-to-maturity securities $ 3,390,152 $ 2,679,326 $ 2,942,363 $ 2,900,694 $ 2,736,805 $ 2,699,480 Less: Allowance for credit losses (310) (78) (83) Held-to-maturity securities, net of allowance for credit losses $ 3,389,842 $ 2,942,285 $ 2,736,722

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2022
Loans and Leases Receivable Disclosure [Abstract]
Summary of Loan Portfolio	The following table shows the Company’s loan portfolio by category as of the dates shown: September 30, December 31, September 30, (Dollars in thousands) 2022 2021 2021 Balance: Commercial $ 12,259,250 $ 11,904,068 $ 11,187,972 Commercial real estate 9,578,184 8,990,286 8,885,714 Home equity 328,822 335,155 347,662 Residential real estate 2,235,459 1,637,099 1,547,736 Premium finance receivables Property and casualty insurance 5,713,340 4,855,487 4,616,977 Life insurance 8,004,856 7,042,810 6,655,453 Consumer and other 47,702 24,199 22,529 Total loans, net of unearned income $ 38,167,613 $ 34,789,104 $ 33,264,043 Mix: Commercial 32 % 34 % 33 % Commercial real estate 25 26 27 Home equity 1 1 1 Residential real estate 6 5 5 Premium finance receivables Property and casualty insurance 15 14 14 Life insurance 21 20 20 Consumer and other 0 0 0 Total loans, net of unearned income 100 % 100 % 100 %
Schedule of Loans Acquired	The following table provides estimated details as of the date of acquisition on PCD loans acquired in 2021: (In thousands) Insurance Agency Loan Portfolio Contractually required payments (unpaid principal balance) $ 13,882 Allowance for credit losses (1) (2,806) Discount, net of any premium (214) Purchase price of PCD loans acquired $ 10,862 (1) The initial allowance for credit losses on PCD loans acquired during 2021 measured approximately $2.8 million, of which $2.3 million was charged off related to PCD loans that met the Company’s charge-off policy at the time of acquisition. After considering these loans that were immediately charged off, the net impact of PCD allowance for credit losses at the acquisition date was approximately $470,000 .

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2022
Credit Loss [Abstract]
Schedule of Aging of the Company's Loan Portfolio	The tables below show the aging of the Company’s loan portfolio by the segmentation noted above at September 30, 2022, December 31, 2021 and September 30, 2021: As of September 30, 2022 90+ days and still accruing 60-89 days past due 30-59 days past due (In thousands) Nonaccrual Current Total Loans Loan Balances (includes PCD): Commercial Commercial, industrial and other, excluding PPP loans $ 44,293 $ 237 $ 23,209 $ 31,640 $ 12,116,213 $ 12,215,592 Commercial PPP loans — — 1,432 3,277 38,949 43,658 Commercial real estate Construction and development 889 — — 5,715 1,518,907 1,525,511 Non-construction 9,588 — 6,041 24,256 8,012,788 8,052,673 Home equity 1,320 — 125 848 326,529 328,822 Residential real estate, excluding early buy-out loans 9,787 — 2,149 15 2,074,844 2,086,795 Premium finance receivables Property and casualty insurance loans 13,026 16,624 15,301 21,128 5,647,261 5,713,340 Life insurance loans — 1,831 13,628 44,954 7,944,443 8,004,856 Consumer and other 7 31 26 343 47,295 47,702 Total loans, net of unearned income, excluding early buy-out loans $ 78,910 $ 18,723 $ 61,911 $ 132,176 $ 37,727,229 $ 38,018,949 Early buy-out loans guaranteed by U.S. government agencies (1) 24,020 68,067 489 104 55,984 148,664 Total loans, net of unearned income $ 102,930 $ 86,790 $ 62,400 $ 132,280 $ 37,783,213 $ 38,167,613 As of December 31, 2021 90+ days and still accruing 60-89 days past due 30-59 days past due (In thousands) Nonaccrual Current Total Loans Loan Balances (includes PCD): Commercial Commercial, industrial and other, excluding PPP loans $ 20,399 $ — $ 23,492 $ 42,933 $ 11,258,961 $ 11,345,785 Commercial PPP loans — 15 770 928 556,570 558,283 Commercial real estate Construction and development 1,377 — — 2,809 1,352,018 1,356,204 Non-construction 20,369 — 284 37,634 7,575,795 7,634,082 Home equity 2,574 — — 1,120 331,461 335,155 Residential real estate, excluding early buy-out loans 16,440 — 982 12,145 1,576,704 1,606,271 Premium finance receivables Property and casualty insurance loans 5,433 7,210 15,490 22,419 4,804,935 4,855,487 Life insurance loans — 7 12,614 66,651 6,963,538 7,042,810 Consumer and other 477 137 34 509 23,042 24,199 Total loans, net of unearned income, excluding early buy-out loans $ 67,069 $ 7,369 $ 53,666 $ 187,148 $ 34,443,024 $ 34,758,276 Early buy-out loans guaranteed by U.S. government agencies (1) — — — 275 30,553 30,828 Total loans, net of unearned income $ 67,069 $ 7,369 $ 53,666 $ 187,423 $ 34,473,577 $ 34,789,104 As of September 30, 2021 90+ days and still accruing 60-89 days past due 30-59 days past due (In thousands) Nonaccrual Current Total Loans Loan Balances (includes PCD): Commercial Commercial, industrial and other, excluding PPP loans $ 26,468 $ — $ 9,768 $ 24,086 $ 10,045,662 $ 10,105,984 Commercial PPP loans — — — 1,138 1,080,850 1,081,988 Commercial real estate Construction and development 1,030 — — 12,631 1,330,054 1,343,715 Non-construction 22,676 — 5,395 67,187 7,446,741 7,541,999 Home equity 3,449 164 340 867 342,842 347,662 Residential real estate, excluding early buy-out loans 22,633 — 1,540 1,076 1,495,501 1,520,750 Premium finance receivables Property and casualty insurance loans 7,300 5,811 10,642 14,614 4,578,610 4,616,977 Life insurance loans — — 5,162 7,040 6,643,251 6,655,453 Consumer and other 384 126 16 125 21,878 22,529 Total loans, net of unearned income, excluding early buy-out loans $ 83,940 $ 6,101 $ 32,863 $ 128,764 $ 32,985,389 $ 33,237,057 Early buy-out loans guaranteed by U.S. government agencies (1) — — — — 26,986 26,986 Total loans, net of unearned income $ 83,940 $ 6,101 $ 32,863 $ 128,764 $ 33,012,375 $ 33,264,043
Summary of Loan Portfolio by Credit Quality Indicator	The table below shows the Company’s loan portfolio by credit quality indicator and year of origination at September 30, 2022: Year of Origination Revolving Total (In thousands) 2022 2021 2020 2019 2018 Prior Revolving to Term Loans Loan Balances: Commercial, industrial and other Pass $ 1,871,088 $ 2,485,791 $ 1,166,137 $ 695,054 $ 517,699 $ 899,602 $ 4,088,668 $ 46,525 $ 11,770,564 Special mention 17,507 47,497 10,996 40,081 39,599 15,177 99,424 90 270,371 Substandard accrual 1,783 41,724 25,692 12,938 6,837 3,681 37,709 — 130,364 Substandard nonaccrual/doubtful 125 370 4,035 29,497 1,224 5,158 3,813 71 44,293 Total commercial, industrial and other $ 1,890,503 $ 2,575,382 $ 1,206,860 $ 777,570 $ 565,359 $ 923,618 $ 4,229,614 $ 46,686 $ 12,215,592 Commercial PPP Pass $ — $ 30,126 $ 7,963 $ — $ — $ — $ — $ — $ 38,089 Special mention — 2,484 289 — — — — — 2,773 Substandard accrual — 2,324 472 — — — — — 2,796 Substandard nonaccrual/doubtful — — — — — — — — — Total commercial PPP $ — $ 34,934 $ 8,724 $ — $ — $ — $ — $ — $ 43,658 Construction and development Pass $ 272,843 $ 490,456 $ 380,020 $ 172,107 $ 37,778 $ 99,876 $ 14,783 $ — $ 1,467,863 Special mention — — 12,647 3,554 19,460 84 — — 35,745 Substandard accrual — — 8,407 — — 12,607 — — 21,014 Substandard nonaccrual/doubtful — — — — — 889 — — 889 Total construction and development $ 272,843 $ 490,456 $ 401,074 $ 175,661 $ 57,238 $ 113,456 $ 14,783 $ — $ 1,525,511 Non-construction Pass $ 1,340,763 $ 1,521,514 $ 1,037,513 $ 883,456 $ 621,687 $ 2,243,859 $ 153,330 $ 5,325 $ 7,807,447 Special mention 4,349 3,954 6,408 15,119 41,036 80,760 — — 151,626 Substandard accrual — — 836 14,286 26,236 42,654 — — 84,012 Substandard nonaccrual/doubtful — — — — 114 9,474 — — 9,588 Total non-construction $ 1,345,112 $ 1,525,468 $ 1,044,757 $ 912,861 $ 689,073 $ 2,376,747 $ 153,330 $ 5,325 $ 8,052,673 Home equity Pass $ — $ — $ — $ 56 $ — $ 5,122 $ 307,969 $ — $ 313,147 Special mention — — — — 237 100 3,785 — 4,122 Substandard accrual — — — — — 8,520 793 920 10,233 Substandard nonaccrual/doubtful — — — 18 — 1,302 — — 1,320 Total home equity $ — $ — $ — $ 74 $ 237 $ 15,044 $ 312,547 $ 920 $ 328,822 Residential real estate Early buy-out loans guaranteed by U.S. government agencies $ — $ 1,365 $ 10,109 $ 24,173 $ 21,038 $ 91,979 $ — $ — $ 148,664 Pass 654,064 838,127 231,989 123,610 52,724 156,557 — — 2,057,071 Special mention 1,275 2,454 166 966 1,399 5,068 — — 11,328 Substandard accrual 679 524 2,903 — 319 4,184 — — 8,609 Substandard nonaccrual/doubtful 113 362 781 2,210 406 5,915 — — 9,787 Total residential real estate $ 656,131 $ 842,832 $ 245,948 $ 150,959 $ 75,886 $ 263,703 $ — $ — $ 2,235,459 Premium finance receivables - property and casualty Pass $ 5,416,268 $ 172,151 $ 9,279 $ 2,651 $ 53 $ — $ — $ — $ 5,600,402 Special mention 92,043 3,822 84 — — — — — 95,949 Substandard accrual 1,033 2,890 40 — — — — — 3,963 Substandard nonaccrual/doubtful 9,206 3,814 6 — — — — — 13,026 Total premium finance receivables - property and casualty $ 5,518,550 $ 182,677 $ 9,409 $ 2,651 $ 53 $ — $ — $ — $ 5,713,340 Premium finance receivables - life Pass $ 389,968 $ 717,377 $ 1,030,974 $ 900,998 $ 751,341 $ 4,214,198 $ — $ — $ 8,004,856 Special mention — — — — — — — — — Substandard accrual — — — — — — — — — Substandard nonaccrual/doubtful — — — — — — — — — Total premium finance receivables - life $ 389,968 $ 717,377 $ 1,030,974 $ 900,998 $ 751,341 $ 4,214,198 $ — $ — $ 8,004,856 Consumer and other Pass $ 2,179 $ 1,822 $ 438 $ 539 $ 390 $ 9,029 $ 33,084 $ — $ 47,481 Special mention — 6 — 4 — 115 4 — 129 Substandard accrual — 4 1 — — 71 9 — 85 Substandard nonaccrual/doubtful — 6 — 1 — — — — 7 Total consumer and other $ 2,179 $ 1,838 $ 439 $ 544 $ 390 $ 9,215 $ 33,097 $ — $ 47,702 Total loans Early buy-out loans guaranteed by U.S. government agencies $ — $ 1,365 $ 10,109 $ 24,173 $ 21,038 $ 91,979 $ — $ — $ 148,664 Pass 9,947,173 6,257,364 3,864,313 2,778,471 1,981,672 7,628,243 4,597,834 51,850 37,106,920 Special mention 115,174 60,217 30,590 59,724 101,731 101,304 103,213 90 572,043 Substandard accrual 3,495 47,466 38,351 27,224 33,392 71,717 38,511 920 261,076 Substandard nonaccrual/doubtful 9,444 4,552 4,822 31,726 1,744 22,738 3,813 71 78,910 Total loans $ 10,075,286 $ 6,370,964 $ 3,948,185 $ 2,921,318 $ 2,139,577 $ 7,915,981 $ 4,743,371 $ 52,931 $ 38,167,613
Held-to-Maturity Debt Securities by Credit Quality Indicator	For purposes of the table below, the Company has converted any issuer rating from an NRSRO into the Company’s internal ratings based on Investment Policy and review by the Company’s management. As of September 30, 2022 Year of Origination Total (In thousands) 2022 2021 2020 2019 2018 Prior Balance Amortized Cost Balances: U.S. government agencies 1-4 internal grade $ 135,000 $ 147,799 $ 25,000 $ 4,000 $ — $ 2,819 $ 314,618 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total U.S. government agencies $ 135,000 $ 147,799 $ 25,000 $ 4,000 $ — $ 2,819 $ 314,618 Municipal 1-4 internal grade $ — $ 7,023 $ 275 $ 160 $ 7,423 $ 165,423 $ 180,304 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total municipal $ — $ 7,023 $ 275 $ 160 $ 7,423 $ 165,423 $ 180,304 Mortgage-backed securities 1-4 internal grade $ 369,719 $ 2,477,108 $ — $ — $ — $ — $ 2,846,827 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total mortgage-backed securities $ 369,719 $ 2,477,108 $ — $ — $ — $ — $ 2,846,827 Corporate notes 1-4 internal grade $ 4,962 $ — $ 6,010 $ 7,334 $ 3,203 $ 26,894 $ 48,403 5-7 internal grade — — — — — — — 8-10 internal grade — — — — — — — Total corporate notes $ 4,962 $ — $ 6,010 $ 7,334 $ 3,203 $ 26,894 $ 48,403 Total held-to-maturity securities $ 3,390,152 Less: Allowance for credit losses (310) Held-to-maturity securities, net of allowance for credit losses $ 3,389,842
Schedule of Allowance for Credit Losses	As significant judgment is required, the review of the appropriateness of the allowance for credit losses is performed quarterly by various committees with participation by the Company's executive management. September 30, December 31, September 30, (In thousands) 2022 2021 2021 Allowance for loan losses $ 246,110 $ 247,835 $ 248,612 Allowance for unfunded lending-related commitments losses 68,918 51,818 47,443 Allowance for loan losses and unfunded lending-related commitments losses 315,028 299,653 296,055 Allowance for held-to-maturity securities losses 310 78 83 Allowance for credit losses $ 315,338 $ 299,731 $ 296,138
Summary of Activity in the Allowance for Credit Losses by Loan Portfolio	A summary of activity in the allowance for credit losses, specifically for the loan portfolio (i.e. allowance for loan losses and allowance for unfunded commitment losses), for the three and nine months ended September 30, 2022 and 2021 is as follows. Three months ended September 30, 2022 Commercial Real Estate Home Equity Residential Real Estate Premium Finance Receivables Consumer and Other Total Loans (In thousands) Commercial Allowance for credit losses at beginning of period $ 142,919 $ 143,732 $ 6,990 $ 10,479 $ 7,502 $ 487 $ 312,109 Other adjustments — — — — (105) — (105) Charge-offs (780) (24) (43) (5) (6,037) (635) (7,524) Recoveries 2,523 55 38 60 1,648 31 4,355 Provision for credit losses (9,346) 6,955 70 489 7,424 601 6,193 Allowance for credit losses at period end $ 135,316 $ 150,718 $ 7,055 $ 11,023 $ 10,432 $ 484 $ 315,028 By measurement method: Individually measured $ 8,866 $ 378 $ 71 $ 727 $ — $ 1 $ 10,043 Collectively measured 126,450 150,340 6,984 10,296 10,432 483 304,985 Loans at period end Individually measured $ 46,547 $ 27,882 $ 11,421 $ 19,440 $ — $ 75 $ 105,365 Collectively measured 12,212,703 9,550,302 317,401 2,059,126 13,718,196 47,627 37,905,355 Loans held at fair value — — — 156,893 — — 156,893 Three months ended September 30, 2021 Commercial Commercial Real Estate Home Equity Residential Real Estate Premium Finance Receivables Consumer and Other Total Loans (In thousands) Allowance for credit losses at beginning of period $ 98,507 $ 158,522 $ 11,207 $ 15,684 $ 19,899 $ 212 $ 304,031 Other adjustments — — — — (65) — (65) Charge-offs (1,352) (406) (59) (10) (1,390) (112) (3,329) Recoveries 816 373 313 5 1,728 92 3,327 Provision for credit losses 11,811 (18,454) (522) 593 (1,597) 260 (7,909) Allowance for credit losses at period end $ 109,782 $ 140,035 $ 10,939 $ 16,272 $ 18,575 $ 452 $ 296,055 By measurement method: Individually measured $ 8,222 $ 1,308 $ 221 $ 940 $ — $ 68 $ 10,759 Collectively measured 101,560 138,727 10,718 15,332 18,575 384 285,296 Loans at period end Individually measured $ 31,001 $ 32,091 $ 16,486 $ 28,966 $ — $ 467 $ 109,011 Collectively measured 11,156,971 8,853,623 331,176 1,487,791 11,272,430 22,062 33,124,053 Loans held at fair value — — — 30,979 — — 30,979 Nine months ended September 30, 2022 Commercial Real Estate Home Equity Residential Real Estate Premium Finance Receivables Consumer and Other Total Loans (In thousands) Commercial Allowance for credit losses at beginning of period $ 119,307 $ 144,583 $ 10,699 $ 8,782 $ 15,859 $ 423 $ 299,653 Other adjustments — — — — (139) — (139) Charge-offs (11,122) (841) (432) (471) (10,618) (1,081) (24,565) Recoveries 4,057 640 254 71 4,243 103 9,368 Provision for credit losses 23,074 6,336 (3,466) 2,641 1,087 1,039 30,711 Allowance for credit losses at period end $ 135,316 $ 150,718 $ 7,055 $ 11,023 $ 10,432 $ 484 $ 315,028 Nine months ended September 30, 2021 Commercial Real Estate Home Equity Residential Real Estate Premium Finance Receivables Consumer and Other Total Loans (In thousands) Commercial Allowance for credit losses at beginning of period $ 94,212 $ 243,603 $ 11,437 $ 12,459 $ 17,777 $ 422 $ 379,910 Other adjustments — — — — (2) — (2) Charge-offs (16,370) (2,798) (201) (15) (6,706) (330) (26,420) Recoveries 2,170 1,087 742 245 6,749 158 11,151 Provision for credit losses 29,770 (101,857) (1,039) 3,583 757 202 (68,584) Allowance for credit losses at period end $ 109,782 $ 140,035 $ 10,939 $ 16,272 $ 18,575 $ 452 $ 296,055
Summary of the Post-Modification Balance of Loans Restructured	The tables below present a summary of the post-modification balance of loans restructured during the three and nine months ended September 30, 2022 and 2021, respectively, which represent TDRs: Three months ended September 30, 2022 (Dollars in thousands) Total (1)(2) Extension at Below Market (2) Reduction of Interest Rate (2) Modification to Interest-only Payments (2) Forgiveness of Debt (2) Count Balance Count Balance Count Balance Count Balance Count Balance Commercial Commercial, industrial and other — $ — — $ — — $ — — $ — — $ — Commercial real estate Non-construction — — — — — — — — — — Residential real estate and other 7 708 7 708 3 435 — — — — Total loans 7 $ 708 7 $ 708 3 $ 435 — $ — — $ — Three months ended September 30, 2021 (Dollars in thousands) Total (1)(2) Extension at Below Market Terms (2) Reduction of Interest Rate (2) Modification to Interest-only Payments (2) Forgiveness of Debt (2) Count Balance Count Balance Count Balance Count Balance Count Balance Commercial Commercial, industrial and other 1 $ 1 1 $ 1 — $ — — $ — — $ — Commercial real estate Non-construction — — — — — — — — — — Residential real estate and other 8 558 7 441 2 202 — — — — Total loans 9 $ 559 8 $ 442 2 $ 202 — $ — — $ — (1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above. (2) Balances represent the recorded investment in the loan at the time of the restructuring. Nine months ended September 30, 2022 (Dollars in thousands) Total (1)(2) Extension at (2) Reduction of Interest (2) Modification to (2) Forgiveness of Debt (2) Count Balance Count Balance Count Balance Count Balance Count Balance Commercial Commercial, industrial and other 5 $ 468 4 $ 305 1 $ 85 2 $ 247 — $ — Commercial real estate Non-construction 2 1,907 1 1,178 1 1,178 2 1,907 — — Residential real estate and other 29 3,851 29 3,851 20 3,002 — — — — Total loans 36 $ 6,226 34 $ 5,334 22 $ 4,265 4 $ 2,154 — $ — Nine months ended September 30, 2021 (Dollars in thousands) Total (1)(2) Extension at Below Market Terms (2) Reduction of Interest Rate (2) Modification to Interest-only Payments (2) Forgiveness of Debt (2) Count Balance Count Balance Count Balance Count Balance Count Balance Commercial Commercial, industrial and other 6 $ 547 6 $ 547 — $ — — $ — — $ — Commercial real estate Non-construction 5 2,944 4 2,401 2 656 1 113 — — Residential real estate and other 34 3,393 33 3,276 13 2,108 — — — — Total loans 45 $ 6,884 43 $ 6,224 15 $ 2,764 1 $ 113 — $ — (1) TDRs may have more than one modification representing a concession. As such, TDRs during the period may be represented in more than one of the categories noted above. (2) Balances represent the recorded investment in the loan at the time of the restructuring. The following table presents a summary of all loans restructured in TDRs during the twelve months ended September 30, 2022 and 2021, and such loans that were in payment default under the restructured terms during the respective periods below: (Dollars in thousands) As of September 30, 2022 Three Months Ended September 30, 2022 Nine months ended September 30, 2022 Total (1)(3) Payments in Default (2)(3) Payments in Default (2)(3) Count Balance Count Balance Count Balance Commercial Commercial, industrial and other 15 $ 4,995 10 $ 4,469 11 $ 4,710 Commercial real estate Non-construction 2 1,907 — — — — Residential real estate and other 39 6,310 3 598 3 598 Total loans 56 $ 13,212 13 $ 5,067 14 $ 5,308 (Dollars in thousands) As of September 30, 2021 Three Months Ended September 30, 2021 Nine months ended September 30, 2021 Total (1)(3) Payments in Default (2)(3) Payments in Default (2)(3) Count Balance Count Balance Count Balance Commercial Commercial, industrial and other 10 $ 2,863 1 $ 199 4 $ 1,524 Commercial real estate Non-construction 6 3,045 3 2,275 3 2,275 Residential real estate and other 50 6,437 2 116 2 116 Total loans 66 $ 12,345 6 $ 2,590 9 $ 3,915 (1) Total TDRs represent all loans restructured in TDRs during the previous twelve months from the date indicated. (2) TDRs considered to be in payment default are over 30 days past due subsequent to the restructuring. (3) Balances represent the recorded investment in the loan at the time of the restructuring.

Goodwill and Other Acquisitio_2

Goodwill and Other Acquisition-Related Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill Assets by Business Segment	A summary of the Company’s goodwill assets by reporting unit is presented in the following table: (In thousands) December 31, 2021 Goodwill Impairment Goodwill Adjustments September 30, Community banking $ 545,671 $ — $ — $ — $ 545,671 Specialty finance 40,105 — — (2,070) 38,035 Wealth management 69,373 — — — 69,373 Total $ 655,149 $ — $ — $ (2,070) $ 653,079
Summary of Infinite-Lived Intangible Assets	A summary of acquisition-related intangible assets as of the dates shown and the expected amortization of finite-lived acquisition-related intangible assets as of September 30, 2022 is as follows: (In thousands) September 30, December 31, September 30, Community banking segment: Core deposit intangibles with finite lives: Gross carrying amount $ 55,206 $ 55,206 $ 55,206 Accumulated amortization (41,480) (38,067) (36,840) Net carrying amount $ 13,726 $ 17,139 $ 18,366 Trademark with indefinite lives: Carrying amount 5,800 5,800 5,800 Total net carrying amount $ 19,526 $ 22,939 $ 24,166 Specialty finance segment: Customer list intangibles with finite lives: Gross carrying amount $ 1,960 $ 1,967 $ 1,967 Accumulated amortization (1,771) (1,721) (1,705) Net carrying amount $ 189 $ 246 $ 262 Wealth management segment: Customer list and other intangibles with finite lives: Gross carrying amount $ 20,430 $ 20,430 $ 20,430 Accumulated amortization (16,525) (15,308) (14,740) Net carrying amount $ 3,905 $ 5,122 $ 5,690 Total acquisition-related intangible assets: Gross carrying amount $ 83,396 $ 83,403 $ 83,403 Accumulated amortization (59,776) (55,096) (53,285) Total other acquisition-related intangible assets, net $ 23,620 $ 28,307 $ 30,118
Summary of Finite-Lived Intangible Assets	A summary of acquisition-related intangible assets as of the dates shown and the expected amortization of finite-lived acquisition-related intangible assets as of September 30, 2022 is as follows: (In thousands) September 30, December 31, September 30, Community banking segment: Core deposit intangibles with finite lives: Gross carrying amount $ 55,206 $ 55,206 $ 55,206 Accumulated amortization (41,480) (38,067) (36,840) Net carrying amount $ 13,726 $ 17,139 $ 18,366 Trademark with indefinite lives: Carrying amount 5,800 5,800 5,800 Total net carrying amount $ 19,526 $ 22,939 $ 24,166 Specialty finance segment: Customer list intangibles with finite lives: Gross carrying amount $ 1,960 $ 1,967 $ 1,967 Accumulated amortization (1,771) (1,721) (1,705) Net carrying amount $ 189 $ 246 $ 262 Wealth management segment: Customer list and other intangibles with finite lives: Gross carrying amount $ 20,430 $ 20,430 $ 20,430 Accumulated amortization (16,525) (15,308) (14,740) Net carrying amount $ 3,905 $ 5,122 $ 5,690 Total acquisition-related intangible assets: Gross carrying amount $ 83,396 $ 83,403 $ 83,403 Accumulated amortization (59,776) (55,096) (53,285) Total other acquisition-related intangible assets, net $ 23,620 $ 28,307 $ 30,118
Estimated Amortization	Estimated amortization Actual in nine months ended September 30, 2022 $ 4,680 Estimated remaining in 2022 1,431 Estimated—2023 4,658 Estimated—2024 3,259 Estimated—2025 2,552 Estimated—2026 1,954

Mortgage Servicing Rights ("M_2

Mortgage Servicing Rights ("MSRs") (Tables)	9 Months Ended
	Sep. 30, 2022
Disclosures Pertaining to Servicing Assets and Servicing Liabilities [Abstract]
Schedule of Servicing Assets at Fair Value	The following is a summary of the changes in the carrying value of MSRs, accounted for at fair value, for the periods indicated: Three Months Ended Nine Months Ended September 30, September 30, September 30, September 30, (In thousands) 2022 2021 2022 2021 Fair value at beginning of the period $ 212,664 $ 127,604 $ 147,571 $ 92,081 Additions from loans sold with servicing retained 13,260 15,546 38,871 57,674 Estimate of changes in fair value due to: Early buyout options (“EBO”) exercised — (116) (176) (518) Payoffs and paydowns (6,041) (8,594) (18,895) (27,302) Changes in valuation inputs or assumptions 9,788 (888) 62,300 11,617 Fair value at end of the period $ 229,671 $ 133,552 $ 229,671 $ 133,552 Unpaid principal balance of mortgage loans serviced for others $ 13,925,755 $ 12,720,126

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2022
Deposits [Abstract]
Summary of Deposits	The following table is a summary of deposits as of the dates shown: (Dollars in thousands) September 30, December 31, September 30, Balance: Non-interest-bearing $ 13,529,277 $ 14,179,980 $ 13,255,417 NOW and interest-bearing demand deposits 5,676,122 4,646,944 4,255,940 Wealth management deposits 2,988,195 2,612,759 2,300,818 Money market 12,538,489 12,840,432 12,148,541 Savings 3,988,790 3,846,681 3,861,296 Time certificates of deposit 4,076,318 3,968,789 4,130,546 Total deposits $ 42,797,191 $ 42,095,585 $ 39,952,558 Mix: Non-interest-bearing 32 % 34 % 33 % NOW and interest-bearing demand deposits 13 11 11 Wealth management deposits 7 6 6 Money market 29 31 30 Savings 9 9 10 Time certificates of deposit 10 9 10 Total deposits 100 % 100 % 100 %

FHLB Advances, Other Borrowin_2

FHLB Advances, Other Borrowings and Subordinated Notes (Tables)	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Summary of Debt	The following table is a summary of FHLB advances, other borrowings and subordinated notes as of the dates shown: (In thousands) September 30, December 31, September 30, FHLB advances $ 2,316,071 $ 1,241,071 $ 1,241,071 Other borrowings: Notes payable 64,268 80,319 85,668 Short-term borrowings 9,212 9,198 14,051 Secured borrowings 311,958 341,327 341,038 Other 61,777 63,292 63,770 Total other borrowings 447,215 494,136 504,527 Subordinated notes 437,260 436,938 436,811 Total FHLB advances, other borrowings and subordinated notes $ 3,200,546 $ 2,172,145 $ 2,182,409
Schedule of Financial Instruments Owned and Pledged as Collateral	The following is a summary of these securities pledged as of September 30, 2022 disaggregated by investment category and maturity of the related customer sweep account, and reconciled to the outstanding balance of securities sold under repurchase agreements: (In thousands) Overnight Sweep Collateral Available-for-sale securities pledged U.S. government agencies $ 9,122 Mortgage-backed securities 8,972 Total collateral pledged 18,094 Excess collateral 8,882 Securities sold under repurchase agreements $ 9,212

Junior Subordinated Debentures

Junior Subordinated Debentures (Tables)	9 Months Ended
	Sep. 30, 2022
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Summary of Junior Subordinated Debentures	The following table provides a summary of the Company’s junior subordinated debentures as of September 30, 2022. The junior subordinated debentures represent the par value of the obligations owed to the Trusts. (Dollars in thousands) Common Trust Junior Rate Contractual Rate at 9/30/2022 Issue Maturity Earliest Wintrust Capital Trust III $ 774 $ 25,000 $ 25,774 L+3.25 5.76 % 04/2003 04/2033 04/2008 Wintrust Statutory Trust IV 619 20,000 20,619 L+2.80 6.47 % 12/2003 12/2033 12/2008 Wintrust Statutory Trust V 1,238 40,000 41,238 L+2.60 6.27 % 05/2004 05/2034 06/2009 Wintrust Capital Trust VII 1,550 50,000 51,550 L+1.95 5.24 % 12/2004 03/2035 03/2010 Wintrust Capital Trust VIII 1,238 25,000 26,238 L+1.45 5.12 % 08/2005 09/2035 09/2010 Wintrust Capital Trust IX 1,547 50,000 51,547 L+1.63 4.92 % 09/2006 09/2036 09/2011 Northview Capital Trust I 186 6,000 6,186 L+3.00 5.78 % 08/2003 11/2033 08/2008 Town Bankshares Capital Trust I 186 6,000 6,186 L+3.00 5.78 % 08/2003 11/2033 08/2008 First Northwest Capital Trust I 155 5,000 5,155 L+3.00 6.67 % 05/2004 05/2034 05/2009 Suburban Illinois Capital Trust II 464 15,000 15,464 L+1.75 5.04 % 12/2006 12/2036 12/2011 Community Financial Shares Statutory Trust II 109 3,500 3,609 L+1.62 4.91 % 06/2007 09/2037 06/2012 Total $ 253,566 5.52 %

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2022
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue by Source	The following table presents revenue from contracts with customers, disaggregated by the revenue source: (Dollars in thousands) Three Months Ended Nine Months Ended Revenue from contracts with customers Location in income statement September 30, September 30, September 30, September 30, Brokerage and insurance product commissions Wealth management $ 4,587 $ 5,230 $ 13,491 $ 15,418 Trust Wealth management 11,213 5,369 24,397 15,765 Asset management Wealth management 17,324 20,932 57,999 60,347 Total wealth management 33,124 31,531 95,887 91,530 Mortgage broker fees Mortgage banking 158 270 714 460 Service charges on deposit accounts Service charges on deposit accounts 14,349 14,149 45,520 39,434 Administrative services Other non-interest income 1,533 1,359 4,977 3,843 Card-related fees Other non-interest income 3,003 2,513 8,320 6,474 Other deposit-related fees Other non-interest income 3,556 3,397 10,101 9,979 Total revenue from contracts with customers $ 55,723 $ 53,219 $ 165,519 $ 151,720
Contract Assets, Contract Liabilities and Receivables from Contracts with Customers	The following table provides information about contract assets, contract liabilities and receivables from contracts with customers: (Dollars in thousands) September 30, December 31, September 30, Contract assets $ — $ — $ — Contract liabilities $ 1,382 $ 1,588 $ 1,632 Mortgage broker fees receivable $ 24 $ 73 $ 31 Administrative services receivable 103 68 185 Wealth management receivable 17,670 11,748 12,001 Card-related fees receivable 612 921 462 Total receivables from contracts with customer $ 18,409 $ 12,810 $ 12,679
Performance Obligations Unsatisfied at End of Period	The following table presents the estimated future timing of recognition of upfront fees related to card and deposit-related fees. These upfront fees represent performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period. (Dollars in thousands) Estimated remaining in 2022 $ 366 Estimated—2023 666 Estimated—2024 250 Estimated—2025 100 Estimated—2026 — Total $ 1,382

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Summary of Segment Information	The following is a summary of certain operating information for reportable segments: Three Months Ended $ Change in % Change in (Dollars in thousands) September 30, September 30, Net interest income: Community Banking $ 319,929 $ 220,007 $ 99,922 45 % Specialty Finance 64,122 52,659 11,463 22 Wealth Management 9,585 7,983 1,602 20 Total Operating Segments 393,636 280,649 112,987 40 Intersegment Eliminations 7,812 6,847 965 14 Consolidated net interest income $ 401,448 $ 287,496 $ 113,952 40 % Provision for credit losses: Community Banking $ 3,608 $ (7,433) $ 11,041 NM Specialty Finance 2,812 (483) 3,295 NM Wealth Management — — — — Total Operating Segments 6,420 (7,916) 14,336 NM Intersegment Eliminations — — — — Consolidated provision for credit losses $ 6,420 $ (7,916) $ 14,336 NM Non-interest income: Community Banking $ 60,615 $ 94,292 $ (33,677) (36) % Specialty Finance 23,784 24,426 (642) (3) Wealth Management 32,452 33,557 (1,105) (3) Total Operating Segments 116,851 152,275 (35,424) (23) Intersegment Eliminations (15,369) (15,801) 432 (3) Consolidated non-interest income $ 101,482 $ 136,474 $ (34,992) (26) % Net revenue: Community Banking $ 380,544 $ 314,299 $ 66,245 21 % Specialty Finance 87,906 77,085 10,821 14 Wealth Management 42,037 41,540 497 1 Total Operating Segments 510,487 432,924 77,563 18 Intersegment Eliminations (7,557) (8,954) 1,397 (16) Consolidated net revenue $ 502,930 $ 423,970 $ 78,960 19 % Segment profit: Community Banking $ 104,668 $ 68,790 $ 35,878 52 % Specialty Finance 27,187 30,202 (3,015) (10) Wealth Management 11,106 10,145 961 9 Consolidated net income $ 142,961 $ 109,137 $ 33,824 31 % Segment assets: Community Banking $ 41,193,521 $ 38,464,169 $ 2,729,352 7 % Specialty Finance 9,450,977 7,918,933 1,532,044 19 Wealth Management 1,738,441 1,449,169 289,272 20 Consolidated total assets $ 52,382,939 $ 47,832,271 $ 4,550,668 10 % NM - Not meaningful Nine Months Ended $ Change in % Change in (Dollars in thousands) September 30, September 30, Net interest income: Community Banking $ 810,270 $ 643,175 $ 167,095 26 % Specialty Finance 178,210 142,752 35,458 25 Wealth Management 27,495 23,197 4,298 19 Total Operating Segments 1,015,975 809,124 206,851 26 Intersegment Eliminations 22,571 19,857 2,714 14 Consolidated net interest income $ 1,038,546 $ 828,981 $ 209,565 25 % Provision for credit losses: Community Banking $ 27,951 $ (69,168) $ 97,119 NM Specialty Finance 2,992 606 2,386 NM Wealth Management — — — — Total Operating Segments 30,943 (68,562) 99,505 NM Intersegment Eliminations — — — — Consolidated provision for credit losses $ 30,943 $ (68,562) $ 99,505 NM Non-interest income: Community Banking $ 245,217 $ 331,970 $ (86,753) (26) % Specialty Finance 72,898 69,999 2,899 4 Wealth Management 93,256 95,651 (2,395) (3) Total Operating Segments 411,371 497,620 (86,249) (17) Intersegment Eliminations (44,157) (45,267) 1,110 (2) Consolidated non-interest income $ 367,214 $ 452,353 $ (85,139) (19) % Net revenue: Community Banking $ 1,055,487 $ 975,145 $ 80,342 8 % Specialty Finance 251,108 212,751 38,357 18 Wealth Management 120,751 118,848 1,903 2 Total Operating Segments 1,427,346 1,306,744 120,602 9 Intersegment Eliminations (21,586) (25,410) 3,824 (15) Consolidated net revenue $ 1,405,760 $ 1,281,334 $ 124,426 10 % Segment profit: Community Banking $ 249,414 $ 263,343 $ (13,929) (5) % Specialty Finance 87,349 77,955 9,394 12 Wealth Management 28,102 26,096 2,006 8 Consolidated net income $ 364,865 $ 367,394 $ (2,529) (1) % NM - Not meaningful

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule Of Fair Value Of Derivative Financial Instruments	The table below presents the fair value of the Company’s derivative financial instruments as of September 30, 2022, December 31, 2021 and September 30, 2021: Derivative Assets Derivative Liabilities (In thousands) September 30, December 31, September 30, September 30, December 31, September 30, Derivatives designated as hedging instruments under ASC 815: Interest rate derivatives designated as Cash Flow Hedges $ 725 $ 47,309 $ 37,529 $ 71,427 $ 10,401 $ 18,054 Interest rate derivatives designated as Fair Value Hedges 17,543 1,474 839 — 5,841 8,427 Total derivatives designated as hedging instruments under ASC 815 $ 18,268 $ 48,783 $ 38,368 $ 71,427 $ 16,242 $ 26,481 Derivatives not designated as hedging instruments under ASC 815: Interest rate derivatives $ 281,030 $ 103,710 $ 130,947 $ 281,999 $ 103,665 $ 131,097 Interest rate lock commitments 141 10,560 16,795 273 885 753 Forward commitments to sell mortgage loans 10,896 1,625 5,260 326 1,878 2,740 Foreign exchange contracts 3,145 330 242 3,145 330 243 Total derivatives not designated as hedging instruments under ASC 815 $ 295,212 $ 116,225 $ 153,244 $ 285,743 $ 106,758 $ 134,833 Total Derivatives $ 313,480 $ 165,008 $ 191,612 $ 357,170 $ 123,000 $ 161,314
Schedule Of Cash Flow Hedging Instruments	The table below provides details on these cash flow hedges, summarized by derivative type and maturity, as of September 30, 2022: September 30, 2022 Notional Fair Value (In thousands) Amount Asset (Liability) Interest Rate Collars: 3-month LIBOR; sell 2.881% floor, buy 3.050% cap; matures September 2023 $ 64,286 $ 725 1-month CME term SOFR; buy 2.250% floor, sell 3.743% cap; matures September 2025 1,250,000 (23,381) 1-month CME term SOFR; buy 2.750% floor, sell 4.320% cap; matures October 2026 500,000 (4,536) 1-month CME term SOFR; buy 2.000% floor, sell 3.450% cap; matures September 2027 1,250,000 (43,510) Total Cash Flow Hedges $ 3,064,286 $ (70,702)
Rollforward Of Amounts In Accumulated Other Comprehensive Income Related To Interest Rate Swaps Designated As Cash Flow Hedges	A rollforward of the amounts in accumulated other comprehensive income or loss related to interest rate derivatives designated as cash flow hedges, including such derivative contracts terminated during the period, follows: Three Months Ended Nine Months Ended (In thousands) September 30, September 30, September 30, September 30, Unrealized gain (loss) at beginning of period $ 78,764 $ 10,471 $ 36,908 $ (31,533) Amount reclassified from accumulated other comprehensive income or loss to interest expense on deposits, other borrowings and junior subordinated debentures (5,451) 6,780 914 20,342 Amount of (loss) income recognized in other comprehensive income (70,990) 2,224 (35,499) 30,666 Unrealized gain at end of period $ 2,323 $ 19,475 $ 2,323 $ 19,475
Schedule of Carrying Amount of Hedged Assets/(Liabilities)	The following table presents the carrying amount of the hedged assets/(liabilities) and the cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged assets/(liabilities) that are designated as a fair value hedge accounting relationship as of September 30, 2022: September 30, 2022 (In thousands) Derivatives in Fair Value Hedging Relationships Location in the Statement of Condition Carrying Amount of the Hedged Assets/(Liabilities) Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities) Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets/(Liabilities) for which Hedge Accounting has been Discontinued Interest rate swaps Loans, net of unearned income $ 187,357 $ (17,481) $ (113) Available-for-sale debt securities 931 (23) — The following table presents the loss or gain recognized related to derivative instruments that are designated as fair value hedges for the respective period: (In thousands) Derivatives in Fair Value Hedging Relationships Location of (Loss)/Gain Recognized Three Months Ended Nine Months Ended September 30, 2022 September 30, 2022 Interest rate swaps Interest and fees on loans $ — $ 23 Interest income - investment securities — —
Summary Amounts Included In Consolidated Statement Of Income Related To Derivatives	Amounts included in the Consolidated Statements of Income related to derivative instruments not designated in hedge relationships were as follows: (In thousands) Three Months Ended Nine Months Ended Derivative Location in income statement September 30, September 30, September 30, September 30, Interest rate swaps and caps Trading (losses) gains, net $ (54) $ 55 $ 4,131 $ (56) Mortgage banking derivatives Mortgage banking revenue (11,236) (4,201) (26,155) (32,160) Foreign exchange contracts Trading (losses) gains, net — (1) — (9) Covered call options Fees from covered call options 1,366 1,157 6,177 2,545 Derivative contract held as economic hedge on MSRs Mortgage banking revenue (2,318) — (2,318) —
Offsetting Assets	The table below summarizes the Company’s interest rate derivatives and offsetting positions as of the dates shown. Derivative Assets Derivative Liabilities Fair Value Fair Value (In thousands) September 30, December 31, September 30, September 30, December 31, September 30, Gross Amounts Recognized $ 299,298 $ 152,493 $ 169,315 $ 353,426 $ 119,907 $ 157,578 Less: Amounts offset in the Statements of Condition — — — — — — Net amount presented in the Statements of Condition $ 299,298 $ 152,493 $ 169,315 $ 353,426 $ 119,907 $ 157,578 Gross amounts not offset in the Statements of Condition Offsetting Derivative Positions (74,101) (52,832) (42,645) (74,101) (52,832) (42,645) Collateral Posted (204,260) (3,530) — — (55,201) (110,440) Net Credit Exposure $ 20,937 $ 96,131 $ 126,670 $ 279,325 $ 11,874 $ 4,493
Offsetting Liabilities	The table below summarizes the Company’s interest rate derivatives and offsetting positions as of the dates shown. Derivative Assets Derivative Liabilities Fair Value Fair Value (In thousands) September 30, December 31, September 30, September 30, December 31, September 30, Gross Amounts Recognized $ 299,298 $ 152,493 $ 169,315 $ 353,426 $ 119,907 $ 157,578 Less: Amounts offset in the Statements of Condition — — — — — — Net amount presented in the Statements of Condition $ 299,298 $ 152,493 $ 169,315 $ 353,426 $ 119,907 $ 157,578 Gross amounts not offset in the Statements of Condition Offsetting Derivative Positions (74,101) (52,832) (42,645) (74,101) (52,832) (42,645) Collateral Posted (204,260) (3,530) — — (55,201) (110,440) Net Credit Exposure $ 20,937 $ 96,131 $ 126,670 $ 279,325 $ 11,874 $ 4,493

Fair Values of Assets and Lia_2

Fair Values of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Summary Of Balances Of Assets And Liabilities Measured At Fair Value On A Recurring Basis	The following tables present the balances of assets and liabilities measured at fair value on a recurring basis for the periods presented: September 30, 2022 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 44,013 — 44,013 — Municipal 174,001 — 51,569 122,432 Corporate notes 87,033 — 87,033 — Mortgage-backed 2,618,606 — 2,618,606 — Trading account securities 179 — 179 — Equity securities with readily determinable fair value 114,012 105,946 8,066 — Mortgage loans held-for-sale 376,160 — 327,740 48,420 Loans held-for-investment 156,893 — 58,326 98,567 MSRs 229,671 — — 229,671 Nonqualified deferred compensation assets 13,387 — 13,387 — Derivative assets 313,480 — 313,339 141 Total $ 4,127,435 $ 105,946 $ 3,522,258 $ 499,231 Derivative liabilities $ 357,170 $ — $ 357,170 $ — December 31, 2021 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ — $ — $ — $ — U.S. government agencies 52,507 — 52,507 — Municipal 165,594 — 59,907 105,687 Corporate notes 95,704 — 95,704 — Mortgage-backed 2,013,988 — 2,013,988 — Trading account securities 1,061 — 1,061 — Equity securities with readily determinable fair value 90,511 82,445 8,066 — Mortgage loans held-for-sale 817,912 — 817,912 — Loans held-for-investment 38,598 — 22,707 15,891 MSRs 147,571 — — 147,571 Nonqualified deferred compensation assets 16,240 — 16,240 — Derivative assets 165,008 — 154,448 10,560 Total $ 3,604,694 $ 82,445 $ 3,242,540 $ 279,709 Derivative liabilities $ 123,000 $ — $ 123,000 $ — September 30, 2021 (In thousands) Total Level 1 Level 2 Level 3 Available-for-sale securities U.S. Treasury $ 6,000 $ 6,000 $ — $ — U.S. government agencies 53,275 — 53,275 — Municipal 174,600 — 56,876 117,724 Corporate notes 99,118 — 99,118 — Mortgage-backed 2,040,485 — 2,040,485 — Trading account securities 1,103 — 1,103 — Equity securities with readily determinable fair value 88,193 80,127 8,066 — Mortgage loans held-for-sale 925,312 — 925,312 — Loans held-for-investment 30,979 — 18,847 12,132 MSRs 133,552 — — 133,552 Nonqualified deferred compensation assets 15,797 — 15,797 — Derivative assets 191,612 — 177,000 14,612 Total $ 3,760,026 $ 86,127 $ 3,395,879 $ 278,020 Derivative liabilities $ 161,314 $ — $ 161,314 $ —
Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value On A Recurring Basis	The changes in Level 3 assets measured at fair value on a recurring basis during the three and nine months ended September 30, 2022 and 2021 are summarized as follows: Mortgage loans held-for-sale U.S. Government agencies Loans held-for- investment Mortgage Derivative assets (In thousands) Municipal Balance at July 1, 2022 $ 113,485 $ 88,963 $ — $ 84,798 $ 212,664 $ 6,649 Total net (losses) gains included in: Net income (1) — (787) — (1,574) 17,007 (6,508) Other comprehensive income or loss (2,618) — — — — — Purchases 11,590 — — — — — Issuances — — — — — — Sales — — — — — — Settlements (25) (27,512) — (12,986) — — Net transfers (out of)/into Level 3 — (12,244) — 28,329 — — Balance at September 30, 2022 $ 122,432 $ 48,420 $ — $ 98,567 $ 229,671 $ 141 Mortgage loans held-for-sale U.S. Government agencies Loans held-for- investment Mortgage Derivative assets (In thousands) Municipal Balance at July 1, 2021 $ 117,606 $ — $ — $ 11,007 $ 127,604 $ 22,570 Total net gains (losses) included in: Net income (1) — — — 54 5,948 (7,958) Other comprehensive income or loss (757) — — — — Purchases 875 — — — — — Issuances — — — — — — Sales — — — — — — Settlements — — — (588) — — Net transfers into Level 3 — — — 1,659 — — Balance at September 30, 2021 $ 117,724 $ — $ — $ 12,132 $ 133,552 $ 14,612 (1) Changes in the balance of MSRs, mortgage loans held-for-sale and derivative assets related to fair value adjustments are recorded as components of mortgage banking revenue. Changes in the balance of loans held-for-investment related to fair value adjustments are recorded as other non-interest income. Mortgage loans held-for-sale U.S. Government Agencies Loans held-for- investment Mortgage Derivative Assets (In thousands) Municipal Balance at January 1, 2022 $ 105,687 $ — $ — $ 15,891 $ 147,571 $ 10,560 Total net (losses) gains included in: Net income (1) — (3,687) — (4,121) 82,100 (10,419) Other comprehensive income or loss (8,752) — — — — — Purchases 28,333 — — — — — Issuances — — — — — — Sales — — — — — — Settlements (2,836) (27,512) — (21,884) — — Net transfers into Level 3 — 79,619 — 108,681 — — Balance at September 30, 2022 $ 122,432 $ 48,420 $ — $ 98,567 $ 229,671 $ 141 Mortgage loans held-for-sale U.S. Government Agencies Loans held-for- investment Mortgage Derivative Assets (In thousands) Municipal Balance at January 1, 2021 $ 109,876 $ — $ 1,966 $ 10,280 $ 92,081 $ 48,091 Total net (losses) gains included in: Net income (1) — — (4) (309) 41,471 (33,479) Other comprehensive income or loss (3,199) — (24) — — — Purchases 19,038 — — — — — Issuances — — — — — — Sales — — — — — — Settlements (7,991) — (1,938) (4,565) — — Net transfers into Level 3 — — — 6,726 — — Balance at September 30, 2021 $ 117,724 $ — $ — $ 12,132 $ 133,552 $ 14,612
Summary Of Assets Measured At Fair Value On A Nonrecurring Basis	For assets measured at fair value on a non-recurring basis that were still held in the balance sheet at the end of the period, the following table provides the carrying value of the related individual assets or portfolios at September 30, 2022: September 30, 2022 Three Months Ended September 30, 2022 Fair Value Losses Recognized, net Nine Months Ended September 30, 2022 Fair Value Losses Recognized, net (In thousands) Total Level 1 Level 2 Level 3 Individually assessed loans - foreclosure probable and collateral-dependent $ 81,889 $ — $ — $ 81,889 $ 837 $ 12,878 Other real estate owned (1) 6,687 — — 6,687 153 435 Total $ 88,576 $ — $ — $ 88,576 $ 990 $ 13,313 (1) Fair value losses recognized, net on other real estate owned include valuation adjustments and charge-offs during the respective period.
Schedule Of Valuation Techniques And Significant Unobservable Inputs Used To Measure Both Recurring And NonRecurring	The valuation techniques and significant unobservable inputs used to measure both recurring and non-recurring Level 3 fair value measurements at September 30, 2022 were as follows: (Dollars in thousands) Fair Value Valuation Methodology Significant Unobservable Input Range Weighted Impact to valuation Measured at fair value on a recurring basis: Municipal securities $ 122,432 Bond pricing Equivalent rating BBB-AA+ N/A Increase Mortgage loans held-for-sale 48,420 Discounted cash flows Discount rate 6.19% 6.19% Decrease Credit discount 0% - 14% 0.23% Decrease Loans held-for-investment 98,567 Discounted cash flows Discount rate 6.00% - 6.50% 6.21% Decrease Credit discount 0% - 35% 0.61% Decrease Constant prepayment rate (CPR) - current loans 6.49% 6.49% Decrease Average life - delinquent loans (in years) 1 year - 13 years 5.5 years Decrease MSRs 229,671 Discounted cash flows Discount rate 8% - 20% 10.29% Decrease Constant prepayment rate (CPR) 0% - 90% 6.49% Decrease Cost of servicing $70 - $200 $ 75 Decrease Cost of servicing - delinquent $200 - 1,250 $ 371 Decrease Derivatives 141 Discounted cash flows Pull-through rate 2% - 100% 85.48 % Increase Measured at fair value on a non-recurring basis: Individually assessed loans - foreclosure probable and collateral-dependent 81,889 Appraisal value Appraisal adjustment - cost of sale 10% 10.00% Decrease Other real estate owned 6,687 Appraisal value Appraisal adjustment - cost of sale 10% 10.00% Decrease
Summary Of Carrying Amounts And Estimated Fair Values Of Financial Instruments	The table below presents the carrying amounts and estimated fair values of the Company’s financial instruments as of the dates shown At September 30, 2022 At December 31, 2021 At September 30, 2021 Carrying Fair Carrying Fair Carrying Fair (In thousands) Value Value Value Value Value Value Financial Assets: Cash and cash equivalents $ 489,647 $ 489,647 $ 411,205 $ 411,205 $ 462,299 $ 462,299 Securities sold under agreements to repurchase with original maturities exceeding three months — — 700,000 700,000 — — Interest-bearing deposits with banks 3,968,605 3,968,605 5,372,603 5,372,603 5,232,315 5,232,315 Available-for-sale securities 2,923,653 2,923,653 2,327,793 2,327,793 2,373,478 2,373,478 Held-to-maturity securities 3,389,842 2,679,326 2,942,285 2,900,694 2,736,722 2,699,480 Trading account securities 179 179 1,061 1,061 1,103 1,103 Equity securities with readily determinable fair value 114,012 114,012 90,511 90,511 88,193 88,193 FHLB and FRB stock, at cost 178,156 178,156 135,378 135,378 135,408 135,408 Brokerage customer receivables 20,327 20,327 26,068 26,068 26,378 26,378 Mortgage loans held-for-sale, at fair value 376,160 376,160 817,912 817,912 925,312 925,312 Loans held-for-investment, at fair value 156,893 156,893 38,598 38,598 30,979 30,979 Loans held-for-investment, at amortized cost 38,010,720 37,224,753 34,750,506 35,297,878 33,233,064 33,276,688 Nonqualified deferred compensation assets 13,387 13,387 16,240 16,240 15,797 15,797 Derivative assets 313,480 313,480 165,008 165,008 191,612 191,612 Accrued interest receivable and other 317,142 317,142 268,921 268,921 272,293 272,293 Total financial assets $ 50,272,203 $ 48,775,720 $ 48,064,089 $ 48,569,870 $ 45,724,953 $ 45,731,335 Financial Liabilities Non-maturity deposits $ 38,720,873 $ 38,720,873 $ 38,126,796 $ 38,126,796 $ 35,822,012 $ 35,822,012 Deposits with stated maturities 4,076,318 4,087,196 3,968,789 3,965,372 4,130,546 4,124,199 FHLB advances 2,316,071 2,230,921 1,241,071 1,186,280 1,241,071 1,164,168 Other borrowings 447,215 447,971 494,136 494,670 504,527 504,527 Subordinated notes 437,260 417,363 436,938 472,684 436,811 474,171 Junior subordinated debentures 253,566 285,238 253,566 212,226 253,566 207,675 Derivative liabilities 357,170 357,170 123,000 123,000 161,314 161,314 Accrued interest payable 18,479 18,479 9,304 9,304 15,030 15,030 Total financial liabilities $ 46,626,952 $ 46,565,211 $ 44,653,600 $ 44,590,332 $ 42,564,877 $ 42,473,096

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Tables)	9 Months Ended
	Sep. 30, 2022
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Summary Of Stock Option Activity	A summary of the Company’s stock option activity for the nine months ended September 30, 2022 and September 30, 2021 is presented below: Stock Options Common Weighted Remaining Contractual Term (1) Intrinsic Value (2) (in thousands) Outstanding at January 1, 2022 193,447 $ 41.62 Granted — — Exercised (88,355) 42.30 Forfeited or canceled (1,430) 40.87 Outstanding at September 30, 2022 103,662 $ 41.04 1.0 $ 4,199 Exercisable at September 30, 2022 103,662 $ 41.04 1.0 $ 4,199 Stock Options Common Weighted Remaining Contractual Term (1) Intrinsic Value (2) (in thousands) Outstanding at January 1, 2021 520,663 $ 42.47 Granted — — Exercised (245,286) 43.05 Forfeited or canceled (590) 46.86 Outstanding at September 30, 2021 274,787 $ 41.95 1.4 $ 10,557 Exercisable at September 30, 2021 273,238 $ 41.92 1.4 $ 10,506 (1) Represents the remaining weighted average contractual life in years. (2) Aggregate intrinsic value represents the total pre-tax intrinsic value (i.e., the difference between the Company’s stock price on the last trading day of the quarter and the option exercise price, multiplied by the number of shares) that would have been received by the option holders if they had exercised their options on the last day of the quarter. Options with exercise prices above the stock price on the last trading day of the quarter are excluded from the calculation of intrinsic value. The intrinsic value will change based on the fair market value of the Company’s stock.
Summary of Plans' Restricted and Performance Share Award Activity	A summary of the Plans’ restricted share activity for the nine months ended September 30, 2022 and September 30, 2021 is presented below: Nine months ended September 30, 2022 Nine months ended September 30, 2021 Restricted Shares Common Weighted Common Weighted Outstanding at January 1 476,813 $ 61.33 234,794 $ 59.02 Granted 223,559 95.98 268,429 63.22 Vested and issued (61,333) 63.85 (13,120) 72.01 Forfeited or canceled (18,632) 75.26 (12,624) 63.55 Outstanding at September 30 620,407 $ 73.15 477,479 $ 60.90 Vested, but deferred, at September 30 96,554 $ 52.94 95,215 $ 52.39 A summary of the Plans’ performance-based stock award activity, based on the target level of the awards, for the nine months ended September 30, 2022 and September 30, 2021 is presented below: Nine months ended September 30, 2022 Nine months ended September 30, 2021 Performance-based Stock Common Weighted Common Weighted Outstanding at January 1 557,255 $ 62.94 482,608 $ 71.15 Granted 160,463 97.15 208,732 58.97 Vested and issued — — — — Forfeited or canceled (172,001) 71.51 (132,998) 86.51 Outstanding at September 30 545,717 $ 70.30 558,342 $ 62.94 Vested, but deferred, at September 30 35,561 $ 44.21 35,040 $ 43.53

Shareholders' Equity and Earn_2

Shareholders' Equity and Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2022
Equity [Abstract]
Components Of Other Comprehensive Income or Loss	The following tables summarize the components of other comprehensive income or loss, including the related income tax effects, and the related amount reclassified to net income for the periods presented (in thousands). Accumulated Accumulated Accumulated Total Balance at July 1, 2022 $ (264,790) $ 57,801 $ (36,048) $ (243,037) Other comprehensive loss during the period, net of tax, before reclassifications (141,758) (52,072) (17,822) (211,652) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (9) (3,998) — (4,007) Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax (32) — — (32) Net other comprehensive loss during the period, net of tax $ (141,799) $ (56,070) $ (17,822) $ (215,691) Balance at September 30, 2022 $ (406,589) $ 1,731 $ (53,870) $ (458,728) Balance at January 1, 2022 $ 8,724 $ 27,111 $ (31,743) $ 4,092 Other comprehensive loss during the period, net of tax, before reclassifications (415,026) (26,050) (22,127) (463,203) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (192) 670 — 478 Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax (95) — — (95) Net other comprehensive loss during the period, net of tax $ (415,313) $ (25,380) $ (22,127) $ (462,820) Balance at September 30, 2022 $ (406,589) $ 1,731 $ (53,870) $ (458,728) Balance at July 1, 2021 $ 30,189 $ 7,720 $ (27,776) $ 10,133 Other comprehensive (loss) income during the period, net of tax, before reclassifications (10,374) 1,631 (4,650) (13,393) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (256) 4,973 — 4,717 Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax (40) — — (40) Net other comprehensive (loss) income during the period, net of tax $ (10,670) $ 6,604 $ (4,650) $ (8,716) Balance at September 30, 2021 $ 19,519 $ 14,324 $ (32,426) $ 1,417 Balance at January 1, 2021 $ 70,737 $ (23,090) $ (32,265) $ 15,382 Other comprehensive (loss) income during the period, net of tax, before reclassifications (50,265) 22,493 (161) (27,933) Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax (837) 14,921 — 14,084 Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax (116) — — (116) Net other comprehensive (loss) income during the period, net of tax $ (51,218) $ 37,414 $ (161) $ (13,965) Balance at September 30, 2021 $ 19,519 $ 14,324 $ (32,426) $ 1,417
Other Comprehensive Income Reclassified from AOCI	Amount Reclassified from Accumulated Other Comprehensive Income (Loss) for the Details Regarding the Component of Accumulated Other Comprehensive Income or Loss Three Months Ended Nine Months Ended Impacted Line on the September 30, September 30, 2022 2021 2022 2021 Accumulated unrealized (losses) gains on securities Gains included in net income $ 12 $ 350 $ 262 $ 1,144 (Losses) gains on investment securities, net 12 350 262 1,144 Income before taxes Tax effect (3) (94) (70) (307) Income tax expense Net of tax $ 9 $ 256 $ 192 $ 837 Net income Accumulated unrealized gains on derivative instruments Amount reclassified to interest expense on deposits $ (5,563) $ 4,947 $ (87) $ 14,898 Interest on deposits Amount reclassified to interest expense on other borrowings 112 636 1,001 1,958 Interest on other borrowings Amount reclassified to interest expense on junior subordinated debentures — 1,197 — 3,486 Interest on junior subordinated debentures 5,451 (6,780) (914) (20,342) Income before taxes Tax effect (1,453) 1,807 244 5,421 Income tax expense Net of tax $ 3,998 $ (4,973) $ (670) $ (14,921) Net income
Computation Of Basic And Diluted Earnings Per Common Share	The following table shows the computation of basic and diluted earnings per share for the periods indicated: Three Months Ended Nine Months Ended (In thousands, except per share data) September 30, September 30, September 30, September 30, Net income $ 142,961 $ 109,137 $ 364,865 $ 367,394 Less: Preferred stock dividends 6,991 6,991 20,973 20,973 Net income applicable to common shares (A) $ 135,970 $ 102,146 $ 343,892 $ 346,421 Weighted average common shares outstanding (B) 60,738 57,000 58,679 56,985 Effect of dilutive potential common shares Common stock equivalents 837 753 814 728 Weighted average common shares and effect of dilutive potential common shares (C) 61,575 57,753 59,493 57,713 Net income per common share: Basic (A/B) $ 2.24 $ 1.79 $ 5.86 $ 6.08 Diluted (A/C) $ 2.21 $ 1.77 $ 5.78 $ 6.00

Business Combinations (Detail)

Business Combinations (Detail) $ in Thousands		9 Months Ended
	Nov. 15, 2021 USD ($) loan	Sep. 30, 2022 USD ($)
Business Acquisition [Line Items]
Goodwill recorded on acquisition		$ 0
Allstate Corporation Loan Portfolio
Business Acquisition [Line Items]
Loans purchased	$ 581,600
Number of loans purchased | loan	1,800
Goodwill recorded on acquisition	$ 9,300

Investment Securities (Schedule

Investment Securities (Schedule of Investment Securities) (Detail) - USD ($)	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Available-for-sale securities
Amortized Cost	$ 3,478,306,000	$ 2,316,369,000	$ 2,347,419,000
Gross Unrealized Gains	127,000	40,094,000	52,948,000
Gross Unrealized Losses	(554,780,000)	(28,670,000)	(26,889,000)
Fair Value	2,923,653,000	2,327,793,000	2,373,478,000
Held-to-maturity securities
Amortized Cost	3,390,152,000	2,942,363,000	2,736,805,000
Gross Unrealized Gains	203,000	10,609,000	12,727,000
Gross Unrealized Losses	(711,029,000)	(52,278,000)	(50,052,000)
Fair Value	2,679,326,000	2,900,694,000	2,699,480,000
Less: Allowance for credit losses	(310,000)	(78,000)	(83,000)
Held-to-maturity securities, net of allowance for credit losses	3,389,842,000	2,942,285,000	2,736,722,000
Equity securities with readily determinable fair value
Amortized Cost	120,073,000	86,989,000	83,909,000
Gross Unrealized Gains	2,233,000	5,354,000	5,678,000
Gross Unrealized Losses	(8,294,000)	(1,832,000)	(1,394,000)
Fair Value	114,012,000	90,511,000	88,193,000
U.S. Treasury
Available-for-sale securities
Amortized Cost	0	0	6,000,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	0	0	0
Fair Value	0	0	6,000,000
U.S. government agencies
Available-for-sale securities
Amortized Cost	50,000,000	50,158,000	50,163,000
Gross Unrealized Gains	0	2,349,000	3,112,000
Gross Unrealized Losses	(5,987,000)	0	0
Fair Value	44,013,000	52,507,000	53,275,000
Held-to-maturity securities
Amortized Cost	314,618,000	180,192,000	176,143,000
Gross Unrealized Gains	0	201,000	482,000
Gross Unrealized Losses	(72,723,000)	(3,314,000)	(2,878,000)
Fair Value	241,895,000	177,079,000	173,747,000
Municipal
Available-for-sale securities
Amortized Cost	181,612,000	161,618,000	170,612,000
Gross Unrealized Gains	127,000	4,193,000	4,202,000
Gross Unrealized Losses	(7,738,000)	(217,000)	(214,000)
Fair Value	174,001,000	165,594,000	174,600,000
Held-to-maturity securities
Amortized Cost	180,304,000	187,486,000	190,662,000
Gross Unrealized Gains	203,000	9,544,000	10,321,000
Gross Unrealized Losses	(7,791,000)	(223,000)	(334,000)
Fair Value	172,716,000	196,807,000	200,649,000
Corporate notes
Held-to-maturity securities
Amortized Cost	48,403,000	43,955,000	51,691,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	(5,705,000)	(1,119,000)	(738,000)
Fair Value	42,698,000	42,836,000	50,953,000
Financial issuers
Available-for-sale securities
Amortized Cost	93,994,000	96,878,000	98,848,000
Gross Unrealized Gains	0	418,000	500,000
Gross Unrealized Losses	(7,951,000)	(2,599,000)	(1,241,000)
Fair Value	86,043,000	94,697,000	98,107,000
Other
Available-for-sale securities
Amortized Cost	1,000,000	1,000,000	1,000,000
Gross Unrealized Gains	0	7,000	11,000
Gross Unrealized Losses	(10,000)	0	0
Fair Value	990,000	1,007,000	1,011,000
Mortgage-backed securities
Available-for-sale securities
Amortized Cost	3,052,778,000	1,901,005,000	1,913,139,000
Gross Unrealized Gains	0	32,830,000	44,931,000
Gross Unrealized Losses	(513,978,000)	(25,854,000)	(25,434,000)
Fair Value	2,538,800,000	1,907,981,000	1,932,636,000
Held-to-maturity securities
Amortized Cost	2,679,862,000	2,530,730,000	2,318,309,000
Gross Unrealized Gains	0	864,000	1,924,000
Gross Unrealized Losses	(600,335,000)	(47,622,000)	(46,102,000)
Fair Value	2,079,527,000	2,483,972,000	2,274,131,000
Collateralized mortgage obligations
Available-for-sale securities
Amortized Cost	98,922,000	105,710,000	107,657,000
Gross Unrealized Gains	0	297,000	192,000
Gross Unrealized Losses	(19,116,000)	0	0
Fair Value	79,806,000	106,007,000	107,849,000
Held-to-maturity securities
Amortized Cost	166,965,000	0	0
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	(24,475,000)	0	0
Fair Value	142,490,000	0	0
Mortgage-backed securities, subprime
Available-for-sale securities
Fair Value	$ 0	$ 0	$ 0

Investment Securities (Narrativ

Investment Securities (Narrative) (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) security	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) security	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Investments, Debt and Equity Securities [Abstract]
Equity securities without readily determinable fair value	$ 43,900,000		$ 43,900,000
Upward adjustments of equity securities without readily determinable fair values	0	$ 0	0	$ 0
Downward adjustments of equity securities without readily determinable fair values	0	0	0	0
Impairment of equity securities without readily determinable fair values	5,000	2,148,000	4,362,000	2,178,000
Pledged securities	$ 2,500,000,000	$ 2,500,000,000	$ 2,500,000,000	$ 2,500,000,000	$ 2,600,000,000
Number of securities by a single non-government sponsored issuer exceeding 10% of shareholders' equity | security	0		0

Investment Securities (Schedu_2

Investment Securities (Schedule of Investment Securities Portfolio Continuous Unrealized Loss Position) (Detail) $ in Thousands	Sep. 30, 2022 USD ($)
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	$ 2,121,477
Continuous unrealized losses existing for less than 12 months, unrealized losses	(340,503)
Continuous unrealized losses existing for greater than 12 months, fair value	788,570
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(214,277)
Total, fair value	2,910,047
Total, unrealized losses	(554,780)
U.S. government agencies
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	44,013
Continuous unrealized losses existing for less than 12 months, unrealized losses	(5,987)
Continuous unrealized losses existing for greater than 12 months, fair value	0
Continuous unrealized losses existing for greater than 12 months, unrealized losses	0
Total, fair value	44,013
Total, unrealized losses	(5,987)
Municipal
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	128,642
Continuous unrealized losses existing for less than 12 months, unrealized losses	(5,960)
Continuous unrealized losses existing for greater than 12 months, fair value	31,753
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(1,778)
Total, fair value	160,395
Total, unrealized losses	(7,738)
Financial issuers
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	20,621
Continuous unrealized losses existing for less than 12 months, unrealized losses	(1,379)
Continuous unrealized losses existing for greater than 12 months, fair value	65,422
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(6,572)
Total, fair value	86,043
Total, unrealized losses	(7,951)
Other
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	990
Continuous unrealized losses existing for less than 12 months, unrealized losses	(10)
Continuous unrealized losses existing for greater than 12 months, fair value	0
Continuous unrealized losses existing for greater than 12 months, unrealized losses	0
Total, fair value	990
Total, unrealized losses	(10)
Mortgage-backed securities
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	1,847,405
Continuous unrealized losses existing for less than 12 months, unrealized losses	(308,051)
Continuous unrealized losses existing for greater than 12 months, fair value	691,395
Continuous unrealized losses existing for greater than 12 months, unrealized losses	(205,927)
Total, fair value	2,538,800
Total, unrealized losses	(513,978)
Collateralized mortgage obligations
Available-for-sale securities
Continuous unrealized losses existing for less than 12 months, fair value	79,806
Continuous unrealized losses existing for less than 12 months, unrealized losses	(19,116)
Continuous unrealized losses existing for greater than 12 months, fair value	0
Continuous unrealized losses existing for greater than 12 months, unrealized losses	0
Total, fair value	79,806
Total, unrealized losses	$ (19,116)

Investment Securities (Schedu_3

Investment Securities (Schedule of Available-for-Sale Investment Securities Gross Gains and Gross Losses Realized) (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Realized gains on investment securities	$ 15,000	$ 355,000	$ 280,000	$ 1,184,000
Realized losses on investment securities	(4,000)	(5,000)	(18,000)	(40,000)
Net realized gains on investment securities	11,000	350,000	262,000	1,144,000
Unrealized gains on equity securities with readily determinable fair value	45,000	1,000	227,000	2,627,000
Unrealized losses on equity securities with readily determinable fair value	(3,154,000)	(634,000)	(9,809,000)	(1,585,000)
Net unrealized (losses) gains on equity securities with readily determinable fair value	(3,109,000)	(633,000)	(9,582,000)	1,042,000
Upward adjustments of equity securities without readily determinable fair values	0	0	0	0
Downward adjustments of equity securities without readily determinable fair values	0	0	0	0
Impairment of equity securities without readily determinable fair values	(5,000)	(2,148,000)	(4,362,000)	(2,178,000)
Adjustment and impairment, net, of equity securities without readily determinable fair values	(5,000)	(2,148,000)	(4,362,000)	(2,178,000)
(Losses) gains on investment securities, net	(3,103,000)	(2,431,000)	(13,682,000)	8,000
Proceeds from sales of available-for-sale securities	0	189,851,000	0	192,227,000
Proceeds from sales of equity securities with readily determinable fair value	3,000,000	3,500,000	21,753,000	9,759,000
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	$ 703,000	$ 1,330,000	$ 1,232,000	$ 2,467,000

Investment Securities (Contract

Investment Securities (Contractual Maturities of Investment Securities) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Available-for-sale securities
Due in one year or less, amortized cost	$ 55,249	$ 49,714	$ 45,459
Due in one to five years, amortized cost	86,555	72,382	92,457
Due in five to ten years, amortized cost	115,949	118,358	121,099
Due after ten years, amortized cost	68,853	69,200	67,608
Amortized Cost	3,478,306	2,316,369	2,347,419
Due in one year or less, fair value	54,846	49,822	45,549
Due in one to five years, fair value	83,641	73,850	94,134
Due in five to ten years, fair value	105,921	117,573	121,650
Due after ten years, fair value	60,639	72,560	71,660
Fair Value	2,923,653	2,327,793	2,373,478
Held-to-maturity securities
Held-to-maturity securities, due in one year or less, amortized cost	1,173	2,976	5,466
Held-to-maturity securities, due in one to five years, amortized cost	85,423	79,422	75,724
Held-to-maturity securities, due in five to ten years, amortized cost	108,703	106,713	150,908
Held-to-maturity securities, due after ten years, amortized cost	348,026	222,522	186,398
Amortized Cost	3,390,152	2,942,363	2,736,805
Less: Allowance for credit losses	(310)	(78)	(83)
Held-to-maturity securities, net of allowance for credit losses	3,389,842	2,942,285	2,736,722
Held-to-maturity securities, due in one year or less, fair value	1,166	2,992	5,493
Held-to-maturity securities, due in one to five years, fair value	78,995	79,705	76,173
Held-to-maturity securities, due in five to ten years, fair value	104,829	112,667	157,282
Held-to-maturity securities, due after ten years, fair value	272,319	221,358	186,401
Fair Value	2,679,326	2,900,694	2,699,480
Mortgage-backed
Available-for-sale securities
Mortgage-backed, without single maturity date, amortized cost	3,151,700	2,006,715	2,020,796
Mortgage-backed, without single maturity date, fair value	2,618,606	2,013,988	2,040,485
Held-to-maturity securities
Mortgage-backed, amortized cost	2,846,827	2,530,730	2,318,309
Mortgage-backed, fair value	$ 2,222,017	$ 2,483,972	$ 2,274,131

Loans (Summary of Loan Portfoli

Loans (Summary of Loan Portfolio) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Loans [Line Items]
Total loans, net of unearned income	$ 38,167,613	$ 34,789,104	$ 33,264,043
Total loans, net of unearned income, percentage	100%	100%	100%
Commercial
Loans [Line Items]
Total loans, net of unearned income	$ 12,259,250	$ 11,904,068	$ 11,187,972
Total loans, net of unearned income, percentage	32%	34%	33%
Commercial real estate
Loans [Line Items]
Total loans, net of unearned income	$ 9,578,184	$ 8,990,286	$ 8,885,714
Total loans, net of unearned income, percentage	25%	26%	27%
Home equity
Loans [Line Items]
Total loans, net of unearned income	$ 328,822	$ 335,155	$ 347,662
Total loans, net of unearned income, percentage	1%	1%	1%
Residential real estate
Loans [Line Items]
Total loans, net of unearned income	$ 2,235,459	$ 1,637,099	$ 1,547,736
Total loans, net of unearned income, percentage	6%	5%	5%
Premium finance receivables | Property and casualty insurance
Loans [Line Items]
Total loans, net of unearned income	$ 5,713,340	$ 4,855,487	$ 4,616,977
Total loans, net of unearned income, percentage	15%	14%	14%
Premium finance receivables | Life insurance
Loans [Line Items]
Total loans, net of unearned income	$ 8,004,856	$ 7,042,810	$ 6,655,453
Total loans, net of unearned income, percentage	21%	20%	20%
Consumer and other
Loans [Line Items]
Total loans, net of unearned income	$ 47,702	$ 24,199	$ 22,529
Total loans, net of unearned income, percentage	0%	0%	0%

Loans (Narrative) (Detail)

Loans (Narrative) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Loans [Line Items]
Loans, net of unearned income	$ 38,167,613	$ 34,789,104	$ 33,264,043
Net deferred loan fees and costs and fair value accounting adjustments	73,100	50,800	13,100
Net deferred loan fees and costs and fair value accounting adjustments, paid by SBA under PPP	1,700
Commercial
Loans [Line Items]
Loans, net of unearned income	12,259,250	11,904,068	11,187,972
Commercial | Commercial PPP loans
Loans [Line Items]
Loans, net of unearned income	43,658	558,283	1,081,988
Premium finance receivables
Loans [Line Items]
Unearned income portion of premium finance receivables	$ 180,100	$ 135,500	$ 124,000

Loans (Schedule of Loans Acquir

Loans (Schedule of Loans Acquired) (Details) - Allstate Corporation Loan Portfolio $ in Thousands	Nov. 15, 2021 USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required payments (unpaid principal balance)	$ 13,882
Allowance for credit losses	(2,806)
Discount, net of any premium	(214)
Purchase price of PCD loans acquired	10,862
Allowance for credit losses, amounts charged-off	2,300
Net impact of allowance for credit losses	$ 470

Allowance for Credit Losses (Sc

Allowance for Credit Losses (Schedule of Aging of the Company's Loan Portfolio) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Financing Receivable, Past Due [Line Items]
Nonaccrual	$ 102,930	$ 67,069	$ 83,940
90+ days and still accruing	86,790	7,369	6,101
Loans, net of unearned income	38,167,613	34,789,104	33,264,043
Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Past Due [Line Items]
Nonaccrual	24,020	0	22,633
90+ days and still accruing	68,067	0	0
Loans, net of unearned income	148,664	30,828	1,520,750
Commercial
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	12,259,250	11,904,068	11,187,972
Commercial | Commercial, industrial and other
Financing Receivable, Past Due [Line Items]
Nonaccrual	44,293	20,399	26,468
90+ days and still accruing	237	0	0
Loans, net of unearned income	12,215,592	11,345,785	10,105,984
Commercial | Commercial PPP loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	0	0	0
90+ days and still accruing	0	15	0
Loans, net of unearned income	43,658	558,283	1,081,988
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	9,578,184	8,990,286	8,885,714
Commercial real estate | Construction and development
Financing Receivable, Past Due [Line Items]
Nonaccrual	889	1,377	1,030
90+ days and still accruing	0	0	0
Loans, net of unearned income	1,525,511	1,356,204	1,343,715
Commercial real estate | Non-construction
Financing Receivable, Past Due [Line Items]
Nonaccrual	9,588	20,369	22,676
90+ days and still accruing	0	0	0
Loans, net of unearned income	8,052,673	7,634,082	7,541,999
Home equity
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,320	2,574	3,449
90+ days and still accruing	0	0	164
Loans, net of unearned income	328,822	335,155	347,662
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	2,235,459	1,637,099	1,547,736
Residential real estate | Residential real estate, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	9,787	16,440	0
90+ days and still accruing	0	0	0
Loans, net of unearned income	2,086,795	1,606,271	26,986
Premium finance receivables | Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	13,026	5,433	7,300
90+ days and still accruing	16,624	7,210	5,811
Loans, net of unearned income	5,713,340	4,855,487	4,616,977
Premium finance receivables | Life insurance loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	0	0	0
90+ days and still accruing	1,831	7	0
Loans, net of unearned income	8,004,856	7,042,810	6,655,453
Consumer and other
Financing Receivable, Past Due [Line Items]
Nonaccrual	7	477	384
90+ days and still accruing	31	137	126
Loans, net of unearned income	47,702	24,199	22,529
Total loans, net of unearned income, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Nonaccrual	78,910	67,069	83,940
90+ days and still accruing	18,723	7,369	6,101
Loans, net of unearned income	38,018,949	34,758,276	33,237,057
60-89 days past due
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	62,400	53,666	32,863
60-89 days past due | Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	489	0	1,540
60-89 days past due | Commercial | Commercial, industrial and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	23,209	23,492	9,768
60-89 days past due | Commercial | Commercial PPP loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	1,432	770	0
60-89 days past due | Commercial real estate | Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	0	0	0
60-89 days past due | Commercial real estate | Non-construction
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	6,041	284	5,395
60-89 days past due | Home equity
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	125	0	340
60-89 days past due | Residential real estate | Residential real estate, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	2,149	982	0
60-89 days past due | Premium finance receivables | Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	15,301	15,490	10,642
60-89 days past due | Premium finance receivables | Life insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	13,628	12,614	5,162
60-89 days past due | Consumer and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	26	34	16
60-89 days past due | Total loans, net of unearned income, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	61,911	53,666	32,863
30-59 days past due
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	132,280	187,423	128,764
30-59 days past due | Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	104	275	1,076
30-59 days past due | Commercial | Commercial, industrial and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	31,640	42,933	24,086
30-59 days past due | Commercial | Commercial PPP loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	3,277	928	1,138
30-59 days past due | Commercial real estate | Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	5,715	2,809	12,631
30-59 days past due | Commercial real estate | Non-construction
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	24,256	37,634	67,187
30-59 days past due | Home equity
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	848	1,120	867
30-59 days past due | Residential real estate | Residential real estate, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	15	12,145	0
30-59 days past due | Premium finance receivables | Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	21,128	22,419	14,614
30-59 days past due | Premium finance receivables | Life insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	44,954	66,651	7,040
30-59 days past due | Consumer and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	343	509	125
30-59 days past due | Total loans, net of unearned income, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	132,176	187,148	128,764
Current
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	37,783,213	34,473,577	33,012,375
Current | Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	55,984	30,553	1,495,501
Current | Commercial | Commercial, industrial and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	12,116,213	11,258,961	10,045,662
Current | Commercial | Commercial PPP loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	38,949	556,570	1,080,850
Current | Commercial real estate | Construction and development
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	1,518,907	1,352,018	1,330,054
Current | Commercial real estate | Non-construction
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	8,012,788	7,575,795	7,446,741
Current | Home equity
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	326,529	331,461	342,842
Current | Residential real estate | Residential real estate, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	2,074,844	1,576,704	26,986
Current | Premium finance receivables | Property and casualty insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	5,647,261	4,804,935	4,578,610
Current | Premium finance receivables | Life insurance loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	7,944,443	6,963,538	6,643,251
Current | Consumer and other
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	47,295	23,042	21,878
Current | Total loans, net of unearned income, excluding early buy-out loans
Financing Receivable, Past Due [Line Items]
Loans, net of unearned income	$ 37,727,229	$ 34,443,024	$ 32,985,389

Allowance for Credit Losses (Lo

Allowance for Credit Losses (Loan Portfolio by Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
2022	$ 10,075,286
2021	6,370,964
2020	3,948,185
2019	2,921,318
2018	2,139,577
Prior	7,915,981
Revolving	4,743,371
Revolving to Term	52,931
Total Loans	38,167,613	$ 34,789,104	$ 33,264,043
Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2022	1,890,503
2021	2,575,382
2020	1,206,860
2019	777,570
2018	565,359
Prior	923,618
Revolving	4,229,614
Revolving to Term	46,686
Total Loans	12,215,592
Commercial PPP loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	34,934
2020	8,724
2019	0
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	43,658
Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2022	272,843
2021	490,456
2020	401,074
2019	175,661
2018	57,238
Prior	113,456
Revolving	14,783
Revolving to Term	0
Total Loans	1,525,511
Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2022	1,345,112
2021	1,525,468
2020	1,044,757
2019	912,861
2018	689,073
Prior	2,376,747
Revolving	153,330
Revolving to Term	5,325
Total Loans	8,052,673
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	74
2018	237
Prior	15,044
Revolving	312,547
Revolving to Term	920
Total Loans	328,822	335,155	347,662
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2022	656,131
2021	842,832
2020	245,948
2019	150,959
2018	75,886
Prior	263,703
Revolving	0
Revolving to Term	0
Total Loans	2,235,459	1,637,099	1,547,736
Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2022	5,518,550
2021	182,677
2020	9,409
2019	2,651
2018	53
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	5,713,340
Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2022	389,968
2021	717,377
2020	1,030,974
2019	900,998
2018	751,341
Prior	4,214,198
Revolving	0
Revolving to Term	0
Total Loans	8,004,856
Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2022	2,179
2021	1,838
2020	439
2019	544
2018	390
Prior	9,215
Revolving	33,097
Revolving to Term	0
Total Loans	47,702	$ 24,199	$ 22,529
Early buy-out loans guaranteed by U.S. government agencies
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	1,365
2020	10,109
2019	24,173
2018	21,038
Prior	91,979
Revolving	0
Revolving to Term	0
Total Loans	148,664
Early buy-out loans guaranteed by U.S. government agencies | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	1,365
2020	10,109
2019	24,173
2018	21,038
Prior	91,979
Revolving	0
Revolving to Term	0
Total Loans	148,664
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2022	9,947,173
2021	6,257,364
2020	3,864,313
2019	2,778,471
2018	1,981,672
Prior	7,628,243
Revolving	4,597,834
Revolving to Term	51,850
Total Loans	37,106,920
Pass | Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2022	1,871,088
2021	2,485,791
2020	1,166,137
2019	695,054
2018	517,699
Prior	899,602
Revolving	4,088,668
Revolving to Term	46,525
Total Loans	11,770,564
Pass | Commercial PPP loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	30,126
2020	7,963
2019	0
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	38,089
Pass | Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2022	272,843
2021	490,456
2020	380,020
2019	172,107
2018	37,778
Prior	99,876
Revolving	14,783
Revolving to Term	0
Total Loans	1,467,863
Pass | Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2022	1,340,763
2021	1,521,514
2020	1,037,513
2019	883,456
2018	621,687
Prior	2,243,859
Revolving	153,330
Revolving to Term	5,325
Total Loans	7,807,447
Pass | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	56
2018	0
Prior	5,122
Revolving	307,969
Revolving to Term	0
Total Loans	313,147
Pass | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2022	654,064
2021	838,127
2020	231,989
2019	123,610
2018	52,724
Prior	156,557
Revolving	0
Revolving to Term	0
Total Loans	2,057,071
Pass | Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2022	5,416,268
2021	172,151
2020	9,279
2019	2,651
2018	53
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	5,600,402
Pass | Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2022	389,968
2021	717,377
2020	1,030,974
2019	900,998
2018	751,341
Prior	4,214,198
Revolving	0
Revolving to Term	0
Total Loans	8,004,856
Pass | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2022	2,179
2021	1,822
2020	438
2019	539
2018	390
Prior	9,029
Revolving	33,084
Revolving to Term	0
Total Loans	47,481
Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
2022	115,174
2021	60,217
2020	30,590
2019	59,724
2018	101,731
Prior	101,304
Revolving	103,213
Revolving to Term	90
Total Loans	572,043
Special mention | Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2022	17,507
2021	47,497
2020	10,996
2019	40,081
2018	39,599
Prior	15,177
Revolving	99,424
Revolving to Term	90
Total Loans	270,371
Special mention | Commercial PPP loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	2,484
2020	289
2019	0
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	2,773
Special mention | Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	12,647
2019	3,554
2018	19,460
Prior	84
Revolving	0
Revolving to Term	0
Total Loans	35,745
Special mention | Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2022	4,349
2021	3,954
2020	6,408
2019	15,119
2018	41,036
Prior	80,760
Revolving	0
Revolving to Term	0
Total Loans	151,626
Special mention | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	237
Prior	100
Revolving	3,785
Revolving to Term	0
Total Loans	4,122
Special mention | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2022	1,275
2021	2,454
2020	166
2019	966
2018	1,399
Prior	5,068
Revolving	0
Revolving to Term	0
Total Loans	11,328
Special mention | Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2022	92,043
2021	3,822
2020	84
2019	0
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	95,949
Special mention | Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	0
Special mention | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	6
2020	0
2019	4
2018	0
Prior	115
Revolving	4
Revolving to Term	0
Total Loans	129
Substandard accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2022	3,495
2021	47,466
2020	38,351
2019	27,224
2018	33,392
Prior	71,717
Revolving	38,511
Revolving to Term	920
Total Loans	261,076
Substandard accrual | Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2022	1,783
2021	41,724
2020	25,692
2019	12,938
2018	6,837
Prior	3,681
Revolving	37,709
Revolving to Term	0
Total Loans	130,364
Substandard accrual | Commercial PPP loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	2,324
2020	472
2019	0
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	2,796
Substandard accrual | Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	8,407
2019	0
2018	0
Prior	12,607
Revolving	0
Revolving to Term	0
Total Loans	21,014
Substandard accrual | Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	836
2019	14,286
2018	26,236
Prior	42,654
Revolving	0
Revolving to Term	0
Total Loans	84,012
Substandard accrual | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	8,520
Revolving	793
Revolving to Term	920
Total Loans	10,233
Substandard accrual | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2022	679
2021	524
2020	2,903
2019	0
2018	319
Prior	4,184
Revolving	0
Revolving to Term	0
Total Loans	8,609
Substandard accrual | Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2022	1,033
2021	2,890
2020	40
2019	0
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	3,963
Substandard accrual | Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	0
Substandard accrual | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	4
2020	1
2019	0
2018	0
Prior	71
Revolving	9
Revolving to Term	0
Total Loans	85
Substandard nonaccrual/doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2022	9,444
2021	4,552
2020	4,822
2019	31,726
2018	1,744
Prior	22,738
Revolving	3,813
Revolving to Term	71
Total Loans	78,910
Substandard nonaccrual/doubtful | Commercial, industrial and other
Financing Receivable, Credit Quality Indicator [Line Items]
2022	125
2021	370
2020	4,035
2019	29,497
2018	1,224
Prior	5,158
Revolving	3,813
Revolving to Term	71
Total Loans	44,293
Substandard nonaccrual/doubtful | Commercial PPP loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	0
Substandard nonaccrual/doubtful | Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	889
Revolving	0
Revolving to Term	0
Total Loans	889
Substandard nonaccrual/doubtful | Non-construction
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	114
Prior	9,474
Revolving	0
Revolving to Term	0
Total Loans	9,588
Substandard nonaccrual/doubtful | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	18
2018	0
Prior	1,302
Revolving	0
Revolving to Term	0
Total Loans	1,320
Substandard nonaccrual/doubtful | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2022	113
2021	362
2020	781
2019	2,210
2018	406
Prior	5,915
Revolving	0
Revolving to Term	0
Total Loans	9,787
Substandard nonaccrual/doubtful | Premium finance receivables - property and casualty
Financing Receivable, Credit Quality Indicator [Line Items]
2022	9,206
2021	3,814
2020	6
2019	0
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	13,026
Substandard nonaccrual/doubtful | Premium finance receivables - life
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	0
Substandard nonaccrual/doubtful | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
2022	0
2021	6
2020	0
2019	1
2018	0
Prior	0
Revolving	0
Revolving to Term	0
Total Loans	$ 7

Allowance for Credit Losses (He

Allowance for Credit Losses (Held-to-Maturity Debt Securities by Credit Quality Indication) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Amortized Cost	$ 3,390,152	$ 2,942,363	$ 2,736,805
Less: Allowance for credit losses	(310)	(78)	(83)
Held-to-maturity securities, net of allowance for credit losses	3,389,842	2,942,285	2,736,722
U.S. government agencies
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	135,000
2021	147,799
2020	25,000
2019	4,000
2018	0
Prior	2,819
Amortized Cost	314,618	180,192	176,143
U.S. government agencies | 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	135,000
2021	147,799
2020	25,000
2019	4,000
2018	0
Prior	2,819
Amortized Cost	314,618
U.S. government agencies | 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Amortized Cost	0
U.S. government agencies | 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Amortized Cost	0
Municipal
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	0
2021	7,023
2020	275
2019	160
2018	7,423
Prior	165,423
Amortized Cost	180,304	$ 187,486	$ 190,662
Municipal | 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	0
2021	7,023
2020	275
2019	160
2018	7,423
Prior	165,423
Amortized Cost	180,304
Municipal | 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Amortized Cost	0
Municipal | 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Amortized Cost	0
Mortgage-backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	369,719
2021	2,477,108
2020	0
2019	0
2018	0
Prior	0
Amortized Cost	2,846,827
Mortgage-backed securities | 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	369,719
2021	2,477,108
2020	0
2019	0
2018	0
Prior	0
Amortized Cost	2,846,827
Mortgage-backed securities | 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Amortized Cost	0
Mortgage-backed securities | 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Amortized Cost	0
Corporate notes
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	4,962
2021	0
2020	6,010
2019	7,334
2018	3,203
Prior	26,894
Amortized Cost	48,403
Corporate notes | 1-4 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	4,962
2021	0
2020	6,010
2019	7,334
2018	3,203
Prior	26,894
Amortized Cost	48,403
Corporate notes | 5-7 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Amortized Cost	0
Corporate notes | 8-10 internal grade
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Amortized Cost	$ 0

Allowance for Credit Losses (Co

Allowance for Credit Losses (Components of Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	$ 315,028	$ 312,109	$ 299,653	$ 296,055	$ 304,031	$ 379,910
Allowance for held-to-maturity securities losses	310		78	83
Allowance for credit losses	315,338		299,731	296,138
Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	246,110		247,835	248,612
Unfunded lending-related commitments
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	68,918		51,818	47,443
Loans and unfunded lending-related commitments
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for loan losses and unfunded lending-related commitments losses	$ 315,028		$ 299,653	$ 296,055

Allowance for Credit Losses (Na

Allowance for Credit Losses (Narrative) (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($) contract	Sep. 30, 2021 USD ($) contract	Sep. 30, 2022 USD ($) contract	Sep. 30, 2021 USD ($) contract	Sep. 30, 2022 USD ($) contract	Sep. 30, 2021 USD ($) contract	Dec. 31, 2021 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest related to financial assets held at amortized cost	$ 158,500,000	$ 119,200,000	$ 158,500,000	$ 119,200,000	$ 158,500,000	$ 119,200,000	$ 117,400,000
Nonaccrual loans with no related allowance for credit losses	32,000,000		32,000,000		$ 32,000,000
Loans reasonably expected to be modified into TDRs			8,400,000
Provision for (reversal of) credit losses	6,193,000	$ (7,909,000)	30,711,000	$ (68,584,000)
Loan net charge-offs	3,200,000		15,200,000
Provision for credit losses	$ 227,000		$ 232,000
TDRs, count | contract	7	9	36	45	56	66
Foreclosed residential real estate properties	$ 1,600,000		$ 1,600,000		$ 1,600,000
TDRs, balance	$ 708,000	$ 559,000	$ 6,226,000	$ 6,884,000	13,212,000	$ 12,345,000
Weighted average extension term	42 months	105 months	64 months	108 months
Weighted average decrease in stated interest rate	1.05%	1.29%	0.88%	1.51%
Loan forgiveness	$ 0	$ 0	$ 0	$ 0
Interest-only payment terms			4 months	6 months
Financing Receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans modified in TDRs	43,200,000		$ 43,200,000		43,200,000
TDRs, count | contract			219
Allowance for loan losses related to impaired loans	2,100,000		$ 2,100,000		2,100,000
Financing Receivable | Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded investment, foreclosure proceedings in process	$ 73,100,000	$ 14,300,000	$ 73,100,000	$ 14,300,000	$ 73,100,000	$ 14,300,000

Allowance for Credit Losses (Su

Allowance for Credit Losses (Summary of Activity in the Allowance for Credit Losses by Loan Portfolio) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	$ 312,109	$ 304,031	$ 299,653	$ 379,910
Other adjustments	(105)	(65)	(139)	(2)
Charge-offs	(7,524)	(3,329)	(24,565)	(26,420)
Recoveries	4,355	3,327	9,368	11,151
Provision for credit losses	6,193	(7,909)	30,711	(68,584)
Allowance for credit losses at period end	315,028	296,055	315,028	296,055
Individually measured	10,043	10,759	10,043	10,759
Collectively measured	304,985	285,296	304,985	285,296
Loans at period end, individually measured	105,365	109,011	105,365	109,011
Loans at period end, collectively measured	37,905,355	33,124,053	37,905,355	33,124,053
Loans held at fair value	156,893	30,979	156,893	30,979
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	142,919	98,507	119,307	94,212
Other adjustments	0	0	0	0
Charge-offs	(780)	(1,352)	(11,122)	(16,370)
Recoveries	2,523	816	4,057	2,170
Provision for credit losses	(9,346)	11,811	23,074	29,770
Allowance for credit losses at period end	135,316	109,782	135,316	109,782
Individually measured	8,866	8,222	8,866	8,222
Collectively measured	126,450	101,560	126,450	101,560
Loans at period end, individually measured	46,547	31,001	46,547	31,001
Loans at period end, collectively measured	12,212,703	11,156,971	12,212,703	11,156,971
Loans held at fair value	0	0	0	0
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	143,732	158,522	144,583	243,603
Other adjustments	0	0	0	0
Charge-offs	(24)	(406)	(841)	(2,798)
Recoveries	55	373	640	1,087
Provision for credit losses	6,955	(18,454)	6,336	(101,857)
Allowance for credit losses at period end	150,718	140,035	150,718	140,035
Individually measured	378	1,308	378	1,308
Collectively measured	150,340	138,727	150,340	138,727
Loans at period end, individually measured	27,882	32,091	27,882	32,091
Loans at period end, collectively measured	9,550,302	8,853,623	9,550,302	8,853,623
Loans held at fair value	0	0	0	0
Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	6,990	11,207	10,699	11,437
Other adjustments	0	0	0	0
Charge-offs	(43)	(59)	(432)	(201)
Recoveries	38	313	254	742
Provision for credit losses	70	(522)	(3,466)	(1,039)
Allowance for credit losses at period end	7,055	10,939	7,055	10,939
Individually measured	71	221	71	221
Collectively measured	6,984	10,718	6,984	10,718
Loans at period end, individually measured	11,421	16,486	11,421	16,486
Loans at period end, collectively measured	317,401	331,176	317,401	331,176
Loans held at fair value	0	0	0	0
Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	10,479	15,684	8,782	12,459
Other adjustments	0	0	0	0
Charge-offs	(5)	(10)	(471)	(15)
Recoveries	60	5	71	245
Provision for credit losses	489	593	2,641	3,583
Allowance for credit losses at period end	11,023	16,272	11,023	16,272
Individually measured	727	940	727	940
Collectively measured	10,296	15,332	10,296	15,332
Loans at period end, individually measured	19,440	28,966	19,440	28,966
Loans at period end, collectively measured	2,059,126	1,487,791	2,059,126	1,487,791
Loans held at fair value	156,893	30,979	156,893	30,979
Premium finance receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	7,502	19,899	15,859	17,777
Other adjustments	(105)	(65)	(139)	(2)
Charge-offs	(6,037)	(1,390)	(10,618)	(6,706)
Recoveries	1,648	1,728	4,243	6,749
Provision for credit losses	7,424	(1,597)	1,087	757
Allowance for credit losses at period end	10,432	18,575	10,432	18,575
Individually measured	0	0	0	0
Collectively measured	10,432	18,575	10,432	18,575
Loans at period end, individually measured	0	0	0	0
Loans at period end, collectively measured	13,718,196	11,272,430	13,718,196	11,272,430
Loans held at fair value	0	0	0	0
Consumer and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	487	212	423	422
Other adjustments	0	0	0	0
Charge-offs	(635)	(112)	(1,081)	(330)
Recoveries	31	92	103	158
Provision for credit losses	601	260	1,039	202
Allowance for credit losses at period end	484	452	484	452
Individually measured	1	68	1	68
Collectively measured	483	384	483	384
Loans at period end, individually measured	75	467	75	467
Loans at period end, collectively measured	47,627	22,062	47,627	22,062
Loans held at fair value	$ 0	$ 0	$ 0	$ 0

Allowance for Credit Losses (_2

Allowance for Credit Losses (Summary of the Post-Modification Balance of Loans Restructured) (Detail) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($) contract	Sep. 30, 2021 USD ($) contract	Sep. 30, 2022 USD ($) contract	Sep. 30, 2021 USD ($) contract	Sep. 30, 2022 USD ($) contract	Sep. 30, 2021 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	7	9	36	45	56	66
TDRs, balance | $	$ 708	$ 559	$ 6,226	$ 6,884	$ 13,212	$ 12,345
Extension at Below Market Terms
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	7	8	34	43
TDRs, balance | $	$ 708	$ 442	$ 5,334	$ 6,224
Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	3	2	22	15
TDRs, balance | $	$ 435	$ 202	$ 4,265	$ 2,764
Modification to Interest-only Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	4	1
TDRs, balance | $	$ 0	$ 0	$ 2,154	$ 113
Forgiveness of Debt
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	0	0
TDRs, balance | $	$ 0	$ 0	$ 0	$ 0
Commercial, industrial and other | Commercial, industrial and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	1	5	6	15	10
TDRs, balance | $	$ 0	$ 1	$ 468	$ 547	$ 4,995	$ 2,863
Commercial, industrial and other | Commercial, industrial and other | Extension at Below Market Terms
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	1	4	6
TDRs, balance | $	$ 0	$ 1	$ 305	$ 547
Commercial, industrial and other | Commercial, industrial and other | Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	1	0
TDRs, balance | $	$ 0	$ 0	$ 85	$ 0
Commercial, industrial and other | Commercial, industrial and other | Modification to Interest-only Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	2	0
TDRs, balance | $	$ 0	$ 0	$ 247	$ 0
Commercial, industrial and other | Commercial, industrial and other | Forgiveness of Debt
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	0	0
TDRs, balance | $	$ 0	$ 0	$ 0	$ 0
Commercial real estate | Non-construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	2	5	2	6
TDRs, balance | $	$ 0	$ 0	$ 1,907	$ 2,944	$ 1,907	$ 3,045
Commercial real estate | Non-construction | Extension at Below Market Terms
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	1	4
TDRs, balance | $	$ 0	$ 0	$ 1,178	$ 2,401
Commercial real estate | Non-construction | Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	1	2
TDRs, balance | $	$ 0	$ 0	$ 1,178	$ 656
Commercial real estate | Non-construction | Modification to Interest-only Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	2	1
TDRs, balance | $	$ 0	$ 0	$ 1,907	$ 113
Commercial real estate | Non-construction | Forgiveness of Debt
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	0	0
TDRs, balance | $	$ 0	$ 0	$ 0	$ 0
Residential real estate and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	7	8	29	34	39	50
TDRs, balance | $	$ 708	$ 558	$ 3,851	$ 3,393	$ 6,310	$ 6,437
Residential real estate and other | Extension at Below Market Terms
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	7	7	29	33
TDRs, balance | $	$ 708	$ 441	$ 3,851	$ 3,276
Residential real estate and other | Reduction of Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	3	2	20	13
TDRs, balance | $	$ 435	$ 202	$ 3,002	$ 2,108
Residential real estate and other | Modification to Interest-only Payments
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	0	0
TDRs, balance | $	$ 0	$ 0	$ 0	$ 0
Residential real estate and other | Forgiveness of Debt
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	0	0
TDRs, balance | $	$ 0	$ 0	$ 0	$ 0

Allowance for Credit Losses (_3

Allowance for Credit Losses (Summary of Loans Restructured and Subsequently Defaulted Under the Restructured Terms) (Detail) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($) contract	Sep. 30, 2021 USD ($) contract	Sep. 30, 2022 USD ($) contract	Sep. 30, 2021 USD ($) contract	Sep. 30, 2022 USD ($) contract	Sep. 30, 2021 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	7	9	36	45	56	66
TDRs, balance | $	$ 708	$ 559	$ 6,226	$ 6,884	$ 13,212	$ 12,345
Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	13	6	14	9
TDRs, balance | $	$ 5,067	$ 2,590	$ 5,308	$ 3,915
Commercial, industrial and other | Commercial, industrial and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	1	5	6	15	10
TDRs, balance | $	$ 0	$ 1	$ 468	$ 547	$ 4,995	$ 2,863
Commercial, industrial and other | Commercial, industrial and other | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	10	1	11	4
TDRs, balance | $	$ 4,469	$ 199	$ 4,710	$ 1,524
Commercial real estate | Non-construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	0	2	5	2	6
TDRs, balance | $	$ 0	$ 0	$ 1,907	$ 2,944	$ 1,907	$ 3,045
Commercial real estate | Non-construction | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	0	3	0	3
TDRs, balance | $	$ 0	$ 2,275	$ 0	$ 2,275
Residential real estate and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	7	8	29	34	39	50
TDRs, balance | $	$ 708	$ 558	$ 3,851	$ 3,393	$ 6,310	$ 6,437
Residential real estate and other | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
TDRs, count | contract	3	2	3	2
TDRs, balance | $	$ 598	$ 116	$ 598	$ 116

Goodwill and Other Acquisitio_3

Goodwill and Other Acquisition-Related Intangible Assets (Goodwill Assets by Business Segment) (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 655,149
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	(2,070)
Ending balance	653,079
Community banking
Goodwill [Roll Forward]
Beginning balance	545,671
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	545,671
Specialty finance
Goodwill [Roll Forward]
Beginning balance	40,105
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	(2,070)
Ending balance	38,035
Wealth management
Goodwill [Roll Forward]
Beginning balance	69,373
Goodwill Acquired	0
Impairment Loss	0
Goodwill Adjustments	0
Ending balance	$ 69,373

Goodwill and Other Acquisitio_4

Goodwill and Other Acquisition-Related Intangible Assets (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Indefinite-lived Intangible Assets [Line Items]
Amortization of other acquisition-related intangible assets	$ 1,492	$ 1,877	$ 4,680	$ 5,923
Specialty finance
Indefinite-lived Intangible Assets [Line Items]
Goodwill decrease for foreign currency translation adjustments			$ (2,100)
Specialty finance | Customer list intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets			18 years
Community banking | Core deposit intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets			10 years
Wealth management | Customer list intangibles
Indefinite-lived Intangible Assets [Line Items]
Amortization period in years, other intangible assets			10 years

Goodwill and Other Acquisitio_5

Goodwill and Other Acquisition-Related Intangible Assets (Summary of Intangible Assets) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Intangibles with finite lives
Accumulated amortization	$ (59,776)	$ (55,096)	$ (53,285)
Intangibles with indefinite lives
Gross carrying amount	83,396	83,403	83,403
Total net carrying amount	23,620	28,307	30,118
Community banking
Intangibles with indefinite lives
Total net carrying amount	19,526	22,939	24,166
Community banking | Trademark
Intangibles with indefinite lives
Carrying amount	5,800	5,800	5,800
Community banking | Core deposit intangibles
Intangibles with finite lives
Gross carrying amount	55,206	55,206	55,206
Accumulated amortization	(41,480)	(38,067)	(36,840)
Net carrying amount	13,726	17,139	18,366
Specialty finance | Customer list intangibles
Intangibles with finite lives
Gross carrying amount	1,960	1,967	1,967
Accumulated amortization	(1,771)	(1,721)	(1,705)
Net carrying amount	189	246	262
Wealth management | Customer list and other intangibles
Intangibles with finite lives
Gross carrying amount	20,430	20,430	20,430
Accumulated amortization	(16,525)	(15,308)	(14,740)
Net carrying amount	$ 3,905	$ 5,122	$ 5,690

Goodwill and Other Acquisitio_6

Goodwill and Other Acquisition-Related Intangible Assets (Estimated Amortization) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Actual in nine months ended September 30, 2022	$ 1,492	$ 1,877	$ 4,680	$ 5,923
Estimated remaining in 2022	1,431		1,431
Estimated—2023	4,658		4,658
Estimated—2024	3,259		3,259
Estimated—2025	2,552		2,552
Estimated—2026	$ 1,954		$ 1,954

Mortgage Servicing Rights ("M_3

Mortgage Servicing Rights ("MSRs") (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Servicing Asset at Fair Value, Amount [Roll Forward]
Fair value at beginning of the period	$ 212,664	$ 127,604	$ 147,571	$ 92,081
Additions from loans sold with servicing retained	13,260	15,546	38,871	57,674
Estimate of changes in fair value due to:
Early buyout options (“EBO”) exercised	0	(116)	(176)	(518)
Payoffs and paydowns	(6,041)	(8,594)	(18,895)	(27,302)
Changes in valuation inputs or assumptions	9,788	(888)	62,300	11,617
Fair value at end of the period	229,671	133,552	229,671	133,552
Unpaid principal balance of mortgage loans serviced for others	$ 13,925,755	$ 12,720,126	$ 13,925,755	$ 12,720,126

Deposits (Detail)

Deposits (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Balance:
Non-interest-bearing	$ 13,529,277	$ 14,179,980	$ 13,255,417
NOW and interest-bearing demand deposits	5,676,122	4,646,944	4,255,940
Wealth management deposits	2,988,195	2,612,759	2,300,818
Money market	12,538,489	12,840,432	12,148,541
Savings	3,988,790	3,846,681	3,861,296
Time certificates of deposit	4,076,318	3,968,789	4,130,546
Total deposits	$ 42,797,191	$ 42,095,585	$ 39,952,558
Mix:
Non-interest-bearing	32%	34%	33%
NOW and interest-bearing demand deposits	13%	11%	11%
Wealth management deposits	7%	6%	6%
Money market	29%	31%	30%
Savings	9%	9%	10%
Time certificates of deposit	10%	9%	10%
Total deposits	100%	100%	100%

FHLB Advances, Other Borrowin_3

FHLB Advances, Other Borrowings and Subordinated Notes (Summary of Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Debt Disclosure [Abstract]
FHLB advances	$ 2,316,071	$ 1,241,071	$ 1,241,071
Other borrowings:
Notes payable	64,268	80,319	85,668
Short-term borrowings	9,212	9,198	14,051
Secured borrowings	311,958	341,327	341,038
Other	61,777	63,292	63,770
Total other borrowings	447,215	494,136	504,527
Subordinated notes	437,260	436,938	436,811
Total FHLB advances, other borrowings and subordinated notes	$ 3,200,546	$ 2,172,145	$ 2,182,409

FHLB Advances, Other Borrowin_4

FHLB Advances, Other Borrowings and Subordinated Notes (Narrative) (Details) $ in Millions

1 Months Ended

9 Months Ended

12 Months Ended

77 Months Ended

Sep. 13, 2022

Sep. 12, 2022

Dec. 31, 2014 CAD ($)

Sep. 30, 2022 USD ($) building Rate

Dec. 31, 2019 USD ($)

Dec. 31, 2014 USD ($)

May 31, 2020 CAD ($)

Dec. 31, 2021 USD ($)

Oct. 06, 2021

Sep. 30, 2021 USD ($)

Mar. 31, 2020 USD ($)

Sep. 18, 2018 USD ($)

Debt Instrument [Line Items]

Outstanding borrowings

$ 64,268,000

$ 80,319,000

$ 85,668,000

Secured borrowings

311,958,000

341,327,000

341,038,000

Other borrowings

61,777,000

63,292,000

63,770,000

Subordinated notes

437,260,000

436,938,000

436,811,000

Collateral Pledged

Debt Instrument [Line Items]

Pledged financial instruments

$ 18,100,000

Line of Credit | Secured Overnight Financing Rate (SOFR)

Debt Instrument [Line Items]

Basis spread on variable rate

1.55%

1.45%

Line of Credit | Base Rate

Debt Instrument [Line Items]

Basis spread on variable rate

0.70%

0.60%

Revolving Credit Facility

Debt Instrument [Line Items]

Commitment fee | Rate

0.30%

Securities sold under repurchase agreements | Overnight Sweep Collateral

Debt Instrument [Line Items]

Securities sold under agreements to repurchase

$ 9,212,000

9,200,000

14,100,000

Pledged financial instruments

18,094,000

Secured Debt

Debt Instrument [Line Items]

Secured borrowings

$ 8,400,000

Fixed Rate Promissory Note

Debt Instrument [Line Items]

Trust  Preferred Securities

$ 66,400,000

Fixed interest rate

1.70%

Number of properties securing debt | building

3

Other borrowings

$ 61,800,000

63,300,000

63,800,000

Term Facility

Debt Instrument [Line Items]

Outstanding borrowings

$ 150,000,000

Term Facility | Base Rate | Base Rate Loan

Debt Instrument [Line Items]

Basis spread on variable rate

0.75%

Term Facility | London Interbank Offered Rate (LIBOR) | Eurodollar Rate Loan

Debt Instrument [Line Items]

Basis spread on variable rate

1.25%

Revolving Credit Facility

Debt Instrument [Line Items]

Outstanding borrowings

$ 100,000,000

Amount outstanding

$ 0

Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) | Base Rate Loan

Debt Instrument [Line Items]

Basis spread on variable rate

1.10%

Revolving Credit Facility | Base Rate | Base Rate Loan

Debt Instrument [Line Items]

Basis spread on variable rate

0.70%

Revolving Credit Facility | Federal Funds Rate | Base Rate Loan

Debt Instrument [Line Items]

Basis spread on variable rate

0.50%

Revolving Credit Facility | Eurodollar rate | Base Rate Loan

Debt Instrument [Line Items]

Basis spread on variable rate

1%

Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Eurodollar Rate Loan

Debt Instrument [Line Items]

Basis spread on variable rate

1.55%

Receivables Purchase Agreement | Secured Debt

Debt Instrument [Line Items]

Proceeds from debt issuance

$ 150

$ 420

Secured borrowings

$ 303,500,000

$ 332,200,000

$ 331,000,000

Receivables Purchase Agreement | Secured Debt | Canadian Commercial Paper Rate

Debt Instrument [Line Items]

Basis spread on variable rate

0.78%

Subordinated debt maturing June 2029

Debt Instrument [Line Items]

Proceeds from common stock offering, net

$ 296,700,000

Subordinated debt maturing June 2029 | Subordinated Debt

Debt Instrument [Line Items]

Trust  Preferred Securities

$ 300,000,000

Fixed interest rate

4.85%

Subordinated debt maturing June 2024 | Subordinated Debt

Debt Instrument [Line Items]

Proceeds from debt issuance

$ 139,100,000

Trust  Preferred Securities

$ 140,000,000

Fixed interest rate

5%

FHLB Advances, Other Borrowin_5

FHLB Advances, Other Borrowings and Subordinated Notes (Schedule of Financial Instruments Owned and Pledged as Collateral) (Details) - Securities sold under repurchase agreements - Overnight Sweep Collateral - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total collateral pledged	$ 18,094
Excess collateral	8,882
Securities sold under repurchase agreements	9,212	$ 9,200	$ 14,100
U.S. government agencies
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total collateral pledged	9,122
Mortgage-backed securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total collateral pledged	$ 8,972

Junior Subordinated Debenture_2

Junior Subordinated Debentures (Narrative) (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($) trust Rate	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)
Subordinated Borrowing [Line Items]
Percentage ownership interest in subsidiary trusts	100%
Number of unconsolidated subsidiary trusts | trust	11
Common securities, approximate percentage of junior subordinated debentures	3%
Trust preferred securities, approximate percentage of junior subordinated debentures	97%
Junior Subordinated Debentures	$ 253,566	$ 253,566	$ 253,566
Period of deferred payment, not to exceed	60 months
Junior Subordinated Debt
Subordinated Borrowing [Line Items]
Junior Subordinated Debentures	$ 253,566	$ 253,600	$ 253,600
Average contractual rate | Rate	5.52%
Tier two risk based capital	$ 245,500
Junior Subordinated Debt | Interest rate swaps
Subordinated Borrowing [Line Items]
Notional Amount	$ 210,000

Junior Subordinated Debenture_3

Junior Subordinated Debentures (Summary of Junior Subordinated Debentures) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Subordinated Borrowing [Line Items]
Junior Subordinated Debentures	$ 253,566	$ 253,566	$ 253,566
Junior Subordinated Debt
Subordinated Borrowing [Line Items]
Junior Subordinated Debentures	$ 253,566	$ 253,600	$ 253,600
Average contractual rate	5.52%
Junior Subordinated Debt | Wintrust Capital Trust III
Subordinated Borrowing [Line Items]
Common Securities	$ 774
Trust  Preferred Securities	25,000
Junior Subordinated Debentures	$ 25,774
Contractual rate	5.76%
Junior Subordinated Debt | Wintrust Capital Trust III | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	3.25%
Junior Subordinated Debt | Wintrust Statutory Trust IV
Subordinated Borrowing [Line Items]
Common Securities	$ 619
Trust  Preferred Securities	20,000
Junior Subordinated Debentures	$ 20,619
Contractual rate	6.47%
Junior Subordinated Debt | Wintrust Statutory Trust IV | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	2.80%
Junior Subordinated Debt | Wintrust Statutory Trust V
Subordinated Borrowing [Line Items]
Common Securities	$ 1,238
Trust  Preferred Securities	40,000
Junior Subordinated Debentures	$ 41,238
Contractual rate	6.27%
Junior Subordinated Debt | Wintrust Statutory Trust V | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	2.60%
Junior Subordinated Debt | Wintrust Capital Trust VII
Subordinated Borrowing [Line Items]
Common Securities	$ 1,550
Trust  Preferred Securities	50,000
Junior Subordinated Debentures	$ 51,550
Contractual rate	5.24%
Junior Subordinated Debt | Wintrust Capital Trust VII | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	1.95%
Junior Subordinated Debt | Wintrust Capital Trust VIII
Subordinated Borrowing [Line Items]
Common Securities	$ 1,238
Trust  Preferred Securities	25,000
Junior Subordinated Debentures	$ 26,238
Contractual rate	5.12%
Junior Subordinated Debt | Wintrust Capital Trust VIII | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	1.45%
Junior Subordinated Debt | Wintrust Capital Trust IX
Subordinated Borrowing [Line Items]
Common Securities	$ 1,547
Trust  Preferred Securities	50,000
Junior Subordinated Debentures	$ 51,547
Contractual rate	4.92%
Junior Subordinated Debt | Wintrust Capital Trust IX | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	1.63%
Junior Subordinated Debt | Northview Capital Trust I
Subordinated Borrowing [Line Items]
Common Securities	$ 186
Trust  Preferred Securities	6,000
Junior Subordinated Debentures	$ 6,186
Contractual rate	5.78%
Junior Subordinated Debt | Northview Capital Trust I | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	3%
Junior Subordinated Debt | Town Bankshares Capital Trust I
Subordinated Borrowing [Line Items]
Common Securities	$ 186
Trust  Preferred Securities	6,000
Junior Subordinated Debentures	$ 6,186
Contractual rate	5.78%
Junior Subordinated Debt | Town Bankshares Capital Trust I | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	3%
Junior Subordinated Debt | First Northwest Capital Trust I
Subordinated Borrowing [Line Items]
Common Securities	$ 155
Trust  Preferred Securities	5,000
Junior Subordinated Debentures	$ 5,155
Contractual rate	6.67%
Junior Subordinated Debt | First Northwest Capital Trust I | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	3%
Junior Subordinated Debt | Suburban Illinois Capital Trust II
Subordinated Borrowing [Line Items]
Common Securities	$ 464
Trust  Preferred Securities	15,000
Junior Subordinated Debentures	$ 15,464
Contractual rate	5.04%
Junior Subordinated Debt | Suburban Illinois Capital Trust II | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	1.75%
Junior Subordinated Debt | Community Financial Shares Statutory Trust II
Subordinated Borrowing [Line Items]
Common Securities	$ 109
Trust  Preferred Securities	3,500
Junior Subordinated Debentures	$ 3,609
Contractual rate	4.91%
Junior Subordinated Debt | Community Financial Shares Statutory Trust II | London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Rate Structure	1.62%

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Disaggregation of Revenue by Source) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 55,723	$ 53,219	$ 165,519	$ 151,720
Brokerage and insurance product commissions
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,587	5,230	13,491	15,418
Trust
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	11,213	5,369	24,397	15,765
Asset management
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	17,324	20,932	57,999	60,347
Wealth management
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	33,124	31,531	95,887	91,530
Mortgage broker fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	158	270	714	460
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	14,349	14,149	45,520	39,434
Administrative services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,533	1,359	4,977	3,843
Card-related fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	3,003	2,513	8,320	6,474
Other deposit-related fees
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 3,556	$ 3,397	$ 10,101	$ 9,979

Revenue from Contracts with C_4

Revenue from Contracts with Customers (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($) subsidiary	Sep. 30, 2021 USD ($)
Revenue from Contract with Customer [Abstract]
Number of wealth management subsidiaries | subsidiary	4
Revenue recognized from contract liability balance | $	$ 977	$ 798

Revenue from Contracts with C_5

Revenue from Contracts with Customers (Contract Assets, Contract Liabilities and Receivables from Contracts with Customers) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Contract assets	$ 0	$ 0	$ 0
Contract liabilities	1,382	1,588	1,632
Mortgage broker fees receivable	24	73	31
Administrative services receivable	103	68	185
Wealth management receivable	17,670	11,748	12,001
Card-related fees receivable	612	921	462
Total receivables from contracts with customer	$ 18,409	$ 12,810	$ 12,679

Revenue from Contracts with C_6

Revenue from Contracts with Customers (Performance Obligations Unsatisfied at End of Period) (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation unsatisfied or partially unsatisfied	$ 1,382
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation unsatisfied or partially unsatisfied	$ 366
Estimated remaining performance period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation unsatisfied or partially unsatisfied	$ 666
Estimated remaining performance period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation unsatisfied or partially unsatisfied	$ 250
Estimated remaining performance period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation unsatisfied or partially unsatisfied	$ 100
Estimated remaining performance period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation unsatisfied or partially unsatisfied	$ 0
Estimated remaining performance period	1 year

Segment Information (Narrative)

Segment Information (Narrative) (Detail)	9 Months Ended
	Sep. 30, 2022 segment subsidiary
Segment Reporting Information [Line Items]
Number of reportable segments	3
Number of subsidiaries | subsidiary	15
Community banking
Segment Reporting Information [Line Items]
Number of reportable segments	1

Segment Information (Summary of

Segment Information (Summary of Segment Information) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Net interest income:
Net interest income	$ 401,448	$ 287,496	$ 1,038,546	$ 828,981
Net interest income, change in contribution	$ 113,952		$ 209,565
Net interest income, percent change in contribution	40%		25%
Provision for credit losses:
Provision for credit losses	$ 6,420	(7,916)	$ 30,943	(68,562)
Provision for credit losses, change in contribution	14,336		99,505
Non-interest income:
Non-interest income	101,482	136,474	367,214	452,353
Non-interest income, change in contribution	$ (34,992)		$ (85,139)
Non-interest income, percent change in contribution	(26.00%)		(19.00%)
Net revenue:
Net revenue	$ 502,930	423,970	$ 1,405,760	1,281,334
Net revenue, change in contribution	$ 78,960		$ 124,426
Net revenue, percent change in contribution	19%		10%
Segment profit:
Segment profit	$ 142,961	109,137	$ 364,865	367,394
Segment profit, change in contribution	$ 33,824		$ (2,529)
Segment profit, percent change in contribution	31%		(1.00%)
Segment assets:
Segment assets	$ 52,382,939	47,832,271	$ 52,382,939	47,832,271	$ 50,142,143
Segment assets, change in contribution	$ 4,550,668
Segment assets, percent change in contribution	10%
Community banking
Segment profit:
Segment profit	$ 104,668	68,790	249,414	263,343
Segment profit, change in contribution	$ 35,878		$ (13,929)
Segment profit, percent change in contribution	52%		(5.00%)
Segment assets:
Segment assets	$ 41,193,521	38,464,169	$ 41,193,521	38,464,169
Segment assets, change in contribution	$ 2,729,352
Segment assets, percent change in contribution	7%
Specialty finance
Segment profit:
Segment profit	$ 27,187	30,202	87,349	77,955
Segment profit, change in contribution	$ (3,015)		$ 9,394
Segment profit, percent change in contribution	(10.00%)		12%
Segment assets:
Segment assets	$ 9,450,977	7,918,933	$ 9,450,977	7,918,933
Segment assets, change in contribution	$ 1,532,044
Segment assets, percent change in contribution	19%
Wealth management
Segment profit:
Segment profit	$ 11,106	10,145	28,102	26,096
Segment profit, change in contribution	$ 961		$ 2,006
Segment profit, percent change in contribution	9%		8%
Segment assets:
Segment assets	$ 1,738,441	1,449,169	$ 1,738,441	1,449,169
Segment assets, change in contribution	$ 289,272
Segment assets, percent change in contribution	20%
Operating Segments
Net interest income:
Net interest income	$ 393,636	280,649	1,015,975	809,124
Net interest income, change in contribution	$ 112,987		$ 206,851
Net interest income, percent change in contribution	40%		26%
Provision for credit losses:
Provision for credit losses	$ 6,420	(7,916)	$ 30,943	(68,562)
Provision for credit losses, change in contribution	14,336		99,505
Non-interest income:
Non-interest income	116,851	152,275	411,371	497,620
Non-interest income, change in contribution	$ (35,424)		$ (86,249)
Non-interest income, percent change in contribution	(23.00%)		(17.00%)
Net revenue:
Net revenue	$ 510,487	432,924	$ 1,427,346	1,306,744
Net revenue, change in contribution	$ 77,563		$ 120,602
Net revenue, percent change in contribution	18%		9%
Operating Segments | Community banking
Net interest income:
Net interest income	$ 319,929	220,007	$ 810,270	643,175
Net interest income, change in contribution	$ 99,922		$ 167,095
Net interest income, percent change in contribution	45%		26%
Provision for credit losses:
Provision for credit losses	$ 3,608	(7,433)	$ 27,951	(69,168)
Provision for credit losses, change in contribution	11,041		97,119
Non-interest income:
Non-interest income	60,615	94,292	245,217	331,970
Non-interest income, change in contribution	$ (33,677)		$ (86,753)
Non-interest income, percent change in contribution	(36.00%)		(26.00%)
Net revenue:
Net revenue	$ 380,544	314,299	$ 1,055,487	975,145
Net revenue, change in contribution	$ 66,245		$ 80,342
Net revenue, percent change in contribution	21%		8%
Operating Segments | Specialty finance
Net interest income:
Net interest income	$ 64,122	52,659	$ 178,210	142,752
Net interest income, change in contribution	$ 11,463		$ 35,458
Net interest income, percent change in contribution	22%		25%
Provision for credit losses:
Provision for credit losses	$ 2,812	(483)	$ 2,992	606
Provision for credit losses, change in contribution	3,295		2,386
Non-interest income:
Non-interest income	23,784	24,426	72,898	69,999
Non-interest income, change in contribution	$ (642)		$ 2,899
Non-interest income, percent change in contribution	(3.00%)		4%
Net revenue:
Net revenue	$ 87,906	77,085	$ 251,108	212,751
Net revenue, change in contribution	$ 10,821		$ 38,357
Net revenue, percent change in contribution	14%		18%
Operating Segments | Wealth management
Net interest income:
Net interest income	$ 9,585	7,983	$ 27,495	23,197
Net interest income, change in contribution	$ 1,602		$ 4,298
Net interest income, percent change in contribution	20%		19%
Provision for credit losses:
Provision for credit losses	$ 0	0	$ 0	0
Provision for credit losses, change in contribution	$ 0		$ 0
Provision for credit losses, percent change in contribution	0%		0%
Non-interest income:
Non-interest income	$ 32,452	33,557	$ 93,256	95,651
Non-interest income, change in contribution	$ (1,105)		$ (2,395)
Non-interest income, percent change in contribution	(3.00%)		(3.00%)
Net revenue:
Net revenue	$ 42,037	41,540	$ 120,751	118,848
Net revenue, change in contribution	$ 497		$ 1,903
Net revenue, percent change in contribution	1%		2%
Intersegment Eliminations
Net interest income:
Net interest income	$ 7,812	6,847	$ 22,571	19,857
Net interest income, change in contribution	$ 965		$ 2,714
Net interest income, percent change in contribution	14%		14%
Provision for credit losses:
Provision for credit losses	$ 0	0	$ 0	0
Provision for credit losses, change in contribution	$ 0		$ 0
Provision for credit losses, percent change in contribution	0%		0%
Non-interest income:
Non-interest income	$ (15,369)	(15,801)	$ (44,157)	(45,267)
Non-interest income, change in contribution	$ 432		$ 1,110
Non-interest income, percent change in contribution	(3.00%)		(2.00%)
Net revenue:
Net revenue	$ (7,557)	$ (8,954)	$ (21,586)	$ (25,410)
Net revenue, change in contribution	$ 1,397		$ 3,824
Net revenue, percent change in contribution	(16.00%)		(15.00%)

Derivative Financial Instrume_3

Derivative Financial Instruments (Schedule Of Fair Value Of Derivative Financial Instruments) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Derivative [Line Items]
Derivative Assets	$ 313,480	$ 165,008	$ 191,612
Derivative Liabilities	357,170	123,000	161,314
Interest rate contract
Derivative [Line Items]
Derivative Assets	299,298	152,493	169,315
Derivative Liabilities	353,426	119,907	157,578
Designated as hedging instrument
Derivative [Line Items]
Derivative Assets	18,268	48,783	38,368
Derivative Liabilities	71,427	16,242	26,481
Designated as hedging instrument | Interest rate contract | Interest rate derivatives designated as Cash Flow Hedges
Derivative [Line Items]
Derivative Assets	725	47,309	37,529
Derivative Liabilities	71,427	10,401	18,054
Designated as hedging instrument | Interest rate contract | Interest rate derivatives designated as Fair Value Hedges
Derivative [Line Items]
Derivative Assets	17,543	1,474	839
Derivative Liabilities	0	5,841	8,427
Not designated as hedging instrument
Derivative [Line Items]
Derivative Assets	295,212	116,225	153,244
Derivative Liabilities	285,743	106,758	134,833
Not designated as hedging instrument | Interest rate contract
Derivative [Line Items]
Derivative Assets	281,030	103,710	130,947
Derivative Liabilities	281,999	103,665	131,097
Not designated as hedging instrument | Interest rate lock commitments
Derivative [Line Items]
Derivative Assets	141	10,560	16,795
Derivative Liabilities	273	885	753
Not designated as hedging instrument | Forward commitments to sell mortgage loans
Derivative [Line Items]
Derivative Assets	10,896	1,625	5,260
Derivative Liabilities	326	1,878	2,740
Not designated as hedging instrument | Foreign exchange contracts
Derivative [Line Items]
Derivative Assets	3,145	330	242
Derivative Liabilities	$ 3,145	$ 330	$ 243

Derivative Financial Instrume_4

Derivative Financial Instruments (Narrative) (Detail)	3 Months Ended	9 Months Ended
	Mar. 31, 2022 USD ($)	Sep. 30, 2022 USD ($) derivativeInstrument	Jun. 30, 2022 USD ($) derivativeInstrument	Dec. 31, 2021 derivativeInstrument	Sep. 30, 2021 derivativeInstrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount to be reclassified from accumulated other comprehensive income to interest expense in the next twelve months		$ 4,300,000
Net derivative liability position, aggregate fair value		0
Interest Rate Swap Terminated
Derivative Instruments, Gain (Loss) [Line Items]
Amount to be reclassified from accumulated other comprehensive income to interest expense in the next twelve months		20,500,000
Mortgage banking derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount		$ 190,000,000
Number of derivative instruments held | derivativeInstrument		3		0	0
Not designated as hedging instrument | Interest rate contract
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount		$ 0
Not designated as hedging instrument | Interest rate contract terminated
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount		1,000,000,000
Not designated as hedging instrument | Interest rate contract, qualified borrowers
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount		9,300,000,000
Not designated as hedging instrument | Interest rate lock commitments
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount		209,200,000
Not designated as hedging instrument | Forward commitments to sell mortgage loans
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount		493,800,000
Not designated as hedging instrument | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount		$ 281,000,000
Not designated as hedging instrument | Covered call options
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative instruments held | derivativeInstrument		0		0	0
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Total Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate derivatives held | derivativeInstrument		1
Notional amount		$ 3,064,286,000
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Swap Terminated, Original Swap Maturing March 2023
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 1,000,000,000
Derivative term	5 years
Fair value of derivative contracts	$ 66,500,000	3,700,000
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Swap Terminated, Original Swap Maturing April 2024
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount			$ 500,000,000
Fair value of derivative contracts		$ 10,700,000
Number of derivative instruments held | derivativeInstrument			2
Interest rate derivatives designated as Fair Value Hedges | Designated as hedging instrument | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate derivatives held | derivativeInstrument		14
Notional amount		$ 205,400,000

Derivative Financial Instrume_5

Derivative Financial Instruments (Schedule Of Cash Flow Hedging Instruments) (Detail) - Designated as hedging instrument - Interest rate derivatives designated as Cash Flow Hedges $ in Thousands	Sep. 30, 2022 USD ($)
3-month LIBOR; sell 2.881% floor, buy 3.050% cap; matures September 2023
Derivative [Line Items]
Derivative floor rate	0.02881
Derivative cap rate	0.03050
Notional Amount	$ 64,286
Fair Value Asset (Liability)	$ 725
1-month CME term SOFR; buy 2.250% floor, sell 3.743% cap; matures September 2025
Derivative [Line Items]
Derivative floor rate	0.02250
Derivative cap rate	0.03743
Notional Amount	$ 1,250,000
Fair Value Asset (Liability)	$ (23,381)
1-month CME term SOFR; buy 2.750% floor, sell 4.320% cap; matures October 2026
Derivative [Line Items]
Derivative floor rate	0.02750
Derivative cap rate	0.04320
Notional Amount	$ 500,000
Fair Value Asset (Liability)	$ (4,536)
1-month CME term SOFR; buy 2.000% floor, sell 3.450% cap; matures September 2027
Derivative [Line Items]
Derivative floor rate	0.02000
Derivative cap rate	0.03450
Notional Amount	$ 1,250,000
Fair Value Asset (Liability)	(43,510)
Total Cash Flow Hedges
Derivative [Line Items]
Notional Amount	3,064,286
Fair Value Asset (Liability)	$ (70,702)

Derivative Financial Instrume_6

Derivative Financial Instruments (Rollforward Of Amounts In Accumulated Other Comprehensive Income Related To Interest Rate Swaps Designated As Cash Flow Hedges) (Detail) - Interest rate contract - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Rollforward of AOCI from Cash Flow Hedging Derivatives [Roll Forward]
Unrealized gain (loss) at beginning of period	$ 78,764	$ 10,471	$ 36,908	$ (31,533)
Amount reclassified from accumulated other comprehensive income or loss to interest expense on deposits, other borrowings and junior subordinated debentures	(5,451)	6,780	914	20,342
Amount of (loss) income recognized in other comprehensive income	(70,990)	2,224	(35,499)	30,666
Unrealized gain at end of period	$ 2,323	$ 19,475	$ 2,323	$ 19,475

Derivative Financial Instrume_7

Derivative Financial Instruments (Derivatives in Fair Value Hedging Relationships) (Detail) - Designated as Hedging Instrument - Interest Rate Swap $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)
Interest and fees on loans
Derivative [Line Items]
Location of (Loss)/Gain Recognized in Income on Derivative	$ 0	$ 23
Interest income - investment securities
Derivative [Line Items]
Location of (Loss)/Gain Recognized in Income on Derivative	0	0
Loans, net of unearned income
Derivative [Line Items]
Carrying Amount of the Hedged Assets/(Liabilities)	187,357	187,357
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)	(17,481)	(17,481)
Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets/(Liabilities) for which Hedge Accounting has been Discontinued	(113)	(113)
Available-for-sale debt securities
Derivative [Line Items]
Carrying Amount of the Hedged Assets/(Liabilities)	931	931
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)	(23)	(23)
Cumulative Amount of Fair Value Hedging Adjustment Remaining for any Hedged Assets/(Liabilities) for which Hedge Accounting has been Discontinued	$ 0	$ 0

Derivative Financial Instrume_8

Derivative Financial Instruments (Summary Amounts Included In Consolidated Statement Of Income Related To Derivatives) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest rate swaps and caps | Trading (losses) gains, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	$ (54)	$ 55	$ 4,131	$ (56)
Mortgage banking derivatives | Mortgage banking revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	(11,236)	(4,201)	(26,155)	(32,160)
Foreign exchange contracts | Trading (losses) gains, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	0	(1)	0	(9)
Covered call options | Fees from covered call options
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	1,366	1,157	6,177	2,545
Derivative contract held as economic hedge on MSRs | Mortgage banking revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	$ (2,318)	$ 0	$ (2,318)	$ 0

Derivative Financial Instrume_9

Derivative Financial Instruments (Summary of Interest Rate Derivatives) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Derivative Assets
Derivative Assets	$ 313,480	$ 165,008	$ 191,612
Derivative Liabilities
Gross Amounts Recognized	357,170	123,000	161,314
Interest rate derivatives
Derivative Assets
Derivative Assets	299,298	152,493	169,315
Less: Amounts offset in the Statements of Condition	0	0	0
Net amount presented in the Statements of Condition	299,298	152,493	169,315
Offsetting Derivative Positions	(74,101)	(52,832)	(42,645)
Collateral Posted	(204,260)	(3,530)	0
Net Credit Exposure	20,937	96,131	126,670
Derivative Liabilities
Gross Amounts Recognized	353,426	119,907	157,578
Less: Amounts offset in the Statements of Condition	0	0	0
Net amount presented in the Statements of Condition	353,426	119,907	157,578
Offsetting Derivative Positions	(74,101)	(52,832)	(42,645)
Collateral Posted	0	(55,201)	(110,440)
Net Credit Exposure	$ 279,325	$ 11,874	$ 4,493

Fair Values of Assets and Lia_3

Fair Values of Assets and Liabilities (Narrative) (Detail)	9 Months Ended
	Sep. 30, 2022 USD ($) $ / shares	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	$ 2,923,653,000		$ 2,327,793,000	$ 2,373,478,000
Loans held-for-investment	156,893,000			30,979,000
MSRs	229,671,000	$ 212,664,000	147,571,000	133,552,000	$ 127,604,000	$ 92,081,000
Individually assessed loans - foreclosure probable and collateral-dependent	105,365,000			109,011,000
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	2,923,653,000		2,327,793,000	2,373,478,000
Remaining contractual principal balance outstanding, mortgage loans held-for-sale	394,000,000		801,600,000	900,800,000
Non-performing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held-for-sale classified as nonaccrual	5,900,000
Mortgage loans held-for-sale classified greater than 90 days past due and still accruing	$ 34,700,000		125,500,000	122,600,000
Weighted Average | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Life of loans	5 years 6 months
Appraisal adjustment - cost of sale | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned, measurement input	0.10
Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held-for-sale	$ 376,160,000		817,912,000	925,312,000
Loans held-for-investment	156,893,000		38,598,000	30,979,000
MSRs	229,671,000		147,571,000	133,552,000
Measured at fair value on a non-recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	81,889,000
Other real estate owned	6,687,000
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	105,400,000
Level 3 | Portion at Other than Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	23,500,000
Level 3 | Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held-for-sale	48,420,000		0	0
Loans held-for-investment	98,567,000		15,891,000	12,132,000
MSRs	229,671,000		147,571,000	133,552,000
Derivative assets	$ 141,000
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Weighted Average | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.1029
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Weighted Average | Mortgage loans held-for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0619
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Weighted Average | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0621
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Weighted Average | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.1029
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Minimum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.08
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Minimum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.08
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Maximum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.20
Level 3 | Measured at fair value on a recurring basis: | Discount rate | Maximum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.20
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Weighted Average | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.0649
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Weighted Average | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0649
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Weighted Average | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0649
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Minimum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Minimum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Maximum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	0.90
Level 3 | Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) | Maximum | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.90
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Weighted Average | Mortgage loans held-for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0023
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Weighted Average | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.0061
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Minimum | Mortgage loans held-for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Minimum | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Maximum | Mortgage loans held-for-sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.14
Level 3 | Measured at fair value on a recurring basis: | Credit discount | Maximum | Loans held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate	0.35
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing | Weighted Average | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	75
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing | Minimum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input | $ / shares	70
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing | Maximum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input | $ / shares	200
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Weighted Average | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input	371
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Minimum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input | $ / shares	200
Level 3 | Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Maximum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs, measurement input | $ / shares	1,250
Level 3 | Measured at fair value on a recurring basis: | Pull-through rate | Weighted Average | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, measurement input	0.8548
Level 3 | Measured at fair value on a recurring basis: | Pull-through rate | Minimum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, measurement input	0.02
Level 3 | Measured at fair value on a recurring basis: | Pull-through rate | Maximum | Discounted cash flows
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, measurement input	1
Level 3 | Measured at fair value on a non-recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	$ 81,889,000
Other real estate owned	6,687,000
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	174,001,000		165,594,000	174,600,000
Municipal securities | Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	174,001,000		165,594,000	174,600,000
Municipal securities | Level 3 | Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	$ 122,432,000		$ 105,687,000	$ 117,724,000

Fair Values of Assets and Lia_4

Fair Values of Assets and Liabilities (Summary of Balances of Assets and Liabilities Measured at Fair Value On A Recurring Basis) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 2,923,653		$ 2,327,793	$ 2,373,478
Equity securities with readily determinable fair value	114,012		90,511	88,193
Loans held-for-investment	156,893			30,979
MSRs	229,671	$ 212,664	147,571	133,552	$ 127,604	$ 92,081
U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	6,000
U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	44,013		52,507	53,275
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	174,001		165,594	174,600
Measured at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	179		1,061	1,103
Equity securities with readily determinable fair value	114,012		90,511	88,193
Mortgage loans held-for-sale	376,160		817,912	925,312
Loans held-for-investment	156,893		38,598	30,979
MSRs	229,671		147,571	133,552
Nonqualified deferred compensation assets	13,387		16,240	15,797
Derivative assets	313,480		165,008	191,612
Total	4,127,435		3,604,694	3,760,026
Derivative liabilities	357,170		123,000	161,314
Measured at fair value on a recurring basis: | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	0		0	0
Equity securities with readily determinable fair value	105,946		82,445	80,127
Mortgage loans held-for-sale	0		0	0
Loans held-for-investment	0		0	0
MSRs	0		0	0
Nonqualified deferred compensation assets	0		0	0
Derivative assets	0		0	0
Total	105,946		82,445	86,127
Derivative liabilities	0		0	0
Measured at fair value on a recurring basis: | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	179		1,061	1,103
Equity securities with readily determinable fair value	8,066		8,066	8,066
Mortgage loans held-for-sale	327,740		817,912	925,312
Loans held-for-investment	58,326		22,707	18,847
MSRs	0		0	0
Nonqualified deferred compensation assets	13,387		16,240	15,797
Derivative assets	313,339		154,448	177,000
Total	3,522,258		3,242,540	3,395,879
Derivative liabilities	357,170		123,000	161,314
Measured at fair value on a recurring basis: | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading account securities	0		0	0
Equity securities with readily determinable fair value	0		0	0
Mortgage loans held-for-sale	48,420		0	0
Loans held-for-investment	98,567		15,891	12,132
MSRs	229,671		147,571	133,552
Nonqualified deferred compensation assets	0		0	0
Derivative assets	141		10,560	14,612
Total	499,231		279,709	278,020
Derivative liabilities	0		0	0
Measured at fair value on a recurring basis: | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	6,000
Measured at fair value on a recurring basis: | U.S. Treasury | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	6,000
Measured at fair value on a recurring basis: | U.S. Treasury | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	0
Measured at fair value on a recurring basis: | U.S. Treasury | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	0
Measured at fair value on a recurring basis: | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	44,013		52,507	53,275
Measured at fair value on a recurring basis: | U.S. government agencies | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	0
Measured at fair value on a recurring basis: | U.S. government agencies | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	44,013		52,507	53,275
Measured at fair value on a recurring basis: | U.S. government agencies | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	0
Mortgage loans held-for-sale	48,420
Measured at fair value on a recurring basis: | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	174,001		165,594	174,600
Measured at fair value on a recurring basis: | Municipal securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	0
Measured at fair value on a recurring basis: | Municipal securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	51,569		59,907	56,876
Measured at fair value on a recurring basis: | Municipal securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	122,432		105,687	117,724
Measured at fair value on a recurring basis: | Corporate notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	87,033		95,704	99,118
Measured at fair value on a recurring basis: | Corporate notes | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	0
Measured at fair value on a recurring basis: | Corporate notes | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	87,033		95,704	99,118
Measured at fair value on a recurring basis: | Corporate notes | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	0
Measured at fair value on a recurring basis: | Mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,618,606		2,013,988	2,040,485
Measured at fair value on a recurring basis: | Mortgage-backed | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0		0	0
Measured at fair value on a recurring basis: | Mortgage-backed | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,618,606		2,013,988	2,040,485
Measured at fair value on a recurring basis: | Mortgage-backed | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 0		$ 0	$ 0

Fair Values of Assets and Lia_5

Fair Values of Assets and Liabilities (Summary of Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Mortgage loans held-for-sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 88,963	$ 0	$ 0	$ 0
Net income	(787)	0	(3,687)	0
Other comprehensive income or loss	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	(27,512)	0	(27,512)	0
Net transfers (out of)/into Level 3	(12,244)	0	79,619	0
Ending balance	48,420	0	48,420	0
Loans held-for- investment
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	84,798	11,007	15,891	10,280
Net income	(1,574)	54	(4,121)	(309)
Other comprehensive income or loss	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	(12,986)	(588)	(21,884)	(4,565)
Net transfers (out of)/into Level 3	28,329	1,659	108,681	6,726
Ending balance	98,567	12,132	98,567	12,132
Mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	212,664	127,604	147,571	92,081
Net income	17,007	5,948	82,100	41,471
Other comprehensive income or loss	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Net transfers (out of)/into Level 3	0	0	0	0
Ending balance	229,671	133,552	229,671	133,552
Derivative assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	6,649	22,570	10,560	48,091
Net income	(6,508)	(7,958)	(10,419)	(33,479)
Other comprehensive income or loss	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Net transfers (out of)/into Level 3	0	0	0	0
Ending balance	141	14,612	141	14,612
Municipal securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	113,485	117,606	105,687	109,876
Net income	0	0	0	0
Other comprehensive income or loss	(2,618)	(757)	(8,752)	(3,199)
Purchases	11,590	875	28,333	19,038
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	(25)	0	(2,836)	(7,991)
Net transfers (out of)/into Level 3	0	0	0	0
Ending balance	122,432	117,724	122,432	117,724
U.S. government agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0	0	0	1,966
Net income	0	0	0	(4)
Other comprehensive income or loss	0		0	(24)
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	(1,938)
Net transfers (out of)/into Level 3	0	0	0	0
Ending balance	$ 0	$ 0	$ 0	$ 0

Fair Values of Assets and Lia_6

Fair Values of Assets and Liabilities (Summary of Assets Measured at Fair Value on a Nonrecurring Basis) (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	$ 105,365	$ 105,365	$ 109,011
Fair value losses - individually assessed loans - foreclosure probable and collateral-dependent	837	12,878
Fair value losses - other real estate owned	153	435
Fair value losses	990	13,313
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	105,400	105,400
Measured at fair value on a non-recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	81,889	81,889
Other real estate owned	6,687	6,687
Total	88,576	88,576
Measured at fair value on a non-recurring basis: | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	0	0
Other real estate owned	0	0
Total	0	0
Measured at fair value on a non-recurring basis: | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	0	0
Other real estate owned	0	0
Total	0	0
Measured at fair value on a non-recurring basis: | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	81,889	81,889
Other real estate owned	6,687	6,687
Total	$ 88,576	$ 88,576

Fair Values of Assets and Lia_7

Fair Values of Assets and Liabilities (Schedule of Valuation Techniques and Significant Unobservable Inputs Used to Measure Both Recurring and Non-Recurring) (Detail)	Sep. 30, 2022 USD ($) $ / shares year	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities, at fair value	$ 2,923,653,000		$ 2,327,793,000	$ 2,373,478,000
Loans held-for-investment	156,893,000			30,979,000
MSRs	229,671,000	$ 212,664,000	147,571,000	133,552,000	$ 127,604,000	$ 92,081,000
Individually assessed loans - foreclosure probable and collateral-dependent	105,365,000			109,011,000
Municipal securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities, at fair value	174,001,000		165,594,000	174,600,000
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	105,400,000
Measured at fair value on a recurring basis:
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale	376,160,000		817,912,000	925,312,000
Loans held-for-investment	156,893,000		38,598,000	30,979,000
MSRs	229,671,000		147,571,000	133,552,000
Derivative assets	313,480,000		165,008,000	191,612,000
Measured at fair value on a recurring basis: | Municipal securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities, at fair value	174,001,000		165,594,000	174,600,000
Measured at fair value on a recurring basis: | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale	48,420,000		0	0
Loans held-for-investment	98,567,000		15,891,000	12,132,000
MSRs	229,671,000		147,571,000	133,552,000
Derivative assets	141,000		10,560,000	14,612,000
Measured at fair value on a recurring basis: | Level 3 | Municipal securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Available-for-sale securities, at fair value	$ 122,432,000		$ 105,687,000	$ 117,724,000
Measured at fair value on a recurring basis: | Discount rate | Level 3 | Discounted cash flows
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale, measurement input	0.0619
Measured at fair value on a recurring basis: | Discount rate | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.0600
MSRs, measurement input	0.08
Measured at fair value on a recurring basis: | Discount rate | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.0650
MSRs, measurement input	0.20
Measured at fair value on a recurring basis: | Discount rate | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale, measurement input	0.0619
Loans held-for-investment, measurement input	0.0621
MSRs, measurement input	0.1029
Measured at fair value on a recurring basis: | Credit discount | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale, measurement input	0
Loans held-for-investment, measurement input	0
Measured at fair value on a recurring basis: | Credit discount | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale, measurement input	0.14
Loans held-for-investment, measurement input	0.35
Measured at fair value on a recurring basis: | Credit discount | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans held-for-sale, measurement input	0.0023
Loans held-for-investment, measurement input	0.0061
Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) - current loans | Level 3 | Discounted cash flows
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.0649
Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) - current loans | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input	0
Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) - current loans | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input	0.90
Measured at fair value on a recurring basis: | Constant prepayment rate (CPR) - current loans | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input	0.0649
MSRs, measurement input	0.0649
Measured at fair value on a recurring basis: | Average life - delinquent loans (in years) | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input | year	1
Measured at fair value on a recurring basis: | Average life - delinquent loans (in years) | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input | year	13
Measured at fair value on a recurring basis: | Average life - delinquent loans (in years) | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-investment, measurement input | year	5.5
Measured at fair value on a recurring basis: | Cost of servicing | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input | $ / shares	70
Measured at fair value on a recurring basis: | Cost of servicing | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input | $ / shares	200
Measured at fair value on a recurring basis: | Cost of servicing | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input	75
Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input | $ / shares	200
Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input | $ / shares	1,250
Measured at fair value on a recurring basis: | Cost of servicing - delinquent | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
MSRs, measurement input	371
Measured at fair value on a recurring basis: | Pull-through rate | Level 3 | Discounted cash flows | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivatives, measurement input	0.02
Measured at fair value on a recurring basis: | Pull-through rate | Level 3 | Discounted cash flows | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivatives, measurement input	1
Measured at fair value on a recurring basis: | Pull-through rate | Level 3 | Discounted cash flows | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivatives, measurement input	0.8548
Measured at fair value on a non-recurring basis:
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	$ 81,889,000
Other real estate owned	6,687,000
Measured at fair value on a non-recurring basis: | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually assessed loans - foreclosure probable and collateral-dependent	81,889,000
Other real estate owned	$ 6,687,000
Measured at fair value on a non-recurring basis: | Appraisal adjustment - cost of sale | Level 3 | Appraisal value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually assessed loans— foreclosure probable and collateral-dependent, measurement input	0.10
Other real estate owned, measurement input	0.10
Measured at fair value on a non-recurring basis: | Appraisal adjustment - cost of sale | Level 3 | Appraisal value | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually assessed loans— foreclosure probable and collateral-dependent, measurement input	0.1000
Other real estate owned, measurement input	0.1000

Fair Values of Assets and Lia_8

Fair Values of Assets and Liabilities (Summary Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Financial Assets:
Interest-bearing deposits with banks	$ 3,968,605	$ 5,372,603	$ 5,232,315
Available-for-sale securities	2,923,653	2,327,793	2,373,478
Held-to-maturity securities	2,679,326	2,900,694	2,699,480
Equity securities with readily determinable fair value	114,012	90,511	88,193
FHLB and FRB stock, at cost	178,156	135,378	135,408
Brokerage customer receivables	20,327	26,068	26,378
Mortgage loans held-for-sale, at fair value	376,160	817,912	925,312
Accrued interest receivable and other	1,316,305	1,084,115	1,166,917
Financial Liabilities
FHLB advances	2,316,071	1,241,071	1,241,071
Other borrowings	447,215	494,136	504,527
Subordinated notes	437,260	436,938	436,811
Junior subordinated debentures	253,566	253,566	253,566
Carrying Value
Financial Assets:
Cash and cash equivalents	489,647	411,205	462,299
Securities sold under agreements to repurchase with original maturities exceeding three months	0	700,000	0
Interest-bearing deposits with banks	3,968,605	5,372,603	5,232,315
Available-for-sale securities	2,923,653	2,327,793	2,373,478
Held-to-maturity securities	3,389,842	2,942,285	2,736,722
Trading account securities	179	1,061	1,103
Equity securities with readily determinable fair value	114,012	90,511	88,193
FHLB and FRB stock, at cost	178,156	135,378	135,408
Brokerage customer receivables	20,327	26,068	26,378
Mortgage loans held-for-sale, at fair value	376,160	817,912	925,312
Nonqualified deferred compensation assets	13,387	16,240	15,797
Derivative assets	313,480	165,008	191,612
Accrued interest receivable and other	317,142	268,921	272,293
Total	50,272,203	48,064,089	45,724,953
Financial Liabilities
Non-maturity deposits	38,720,873	38,126,796	35,822,012
Deposits with stated maturities	4,076,318	3,968,789	4,130,546
FHLB advances	2,316,071	1,241,071	1,241,071
Other borrowings	447,215	494,136	504,527
Subordinated notes	437,260	436,938	436,811
Junior subordinated debentures	253,566	253,566	253,566
Derivative liabilities	357,170	123,000	161,314
Accrued interest payable	18,479	9,304	15,030
Total financial liabilities	46,626,952	44,653,600	42,564,877
Carrying Value | Loans held-for-investment, at fair value
Financial Assets:
Loans held-for-investment	156,893	38,598	30,979
Carrying Value | Loans held-for-investment, at amortized cost
Financial Assets:
Loans held-for-investment	38,010,720	34,750,506	33,233,064
Fair Value
Financial Assets:
Cash and cash equivalents	489,647	411,205	462,299
Securities sold under agreements to repurchase with original maturities exceeding three months	0	700,000	0
Interest-bearing deposits with banks	3,968,605	5,372,603	5,232,315
Available-for-sale securities	2,923,653	2,327,793	2,373,478
Held-to-maturity securities	2,679,326	2,900,694	2,699,480
Trading account securities	179	1,061	1,103
Equity securities with readily determinable fair value	114,012	90,511	88,193
FHLB and FRB stock, at cost	178,156	135,378	135,408
Brokerage customer receivables	20,327	26,068	26,378
Mortgage loans held-for-sale, at fair value	376,160	817,912	925,312
Nonqualified deferred compensation assets	13,387	16,240	15,797
Derivative assets	313,480	165,008	191,612
Accrued interest receivable and other	317,142	268,921	272,293
Total	48,775,720	48,569,870	45,731,335
Financial Liabilities
Non-maturity deposits	38,720,873	38,126,796	35,822,012
Deposits with stated maturities	4,087,196	3,965,372	4,124,199
FHLB advances	2,230,921	1,186,280	1,164,168
Other borrowings	447,971	494,670	504,527
Subordinated notes	417,363	472,684	474,171
Junior subordinated debentures	285,238	212,226	207,675
Derivative liabilities	357,170	123,000	161,314
Accrued interest payable	18,479	9,304	15,030
Total financial liabilities	46,565,211	44,590,332	42,473,096
Fair Value | Loans held-for-investment, at fair value
Financial Assets:
Loans held-for-investment	156,893	38,598	30,979
Fair Value | Loans held-for-investment, at amortized cost
Financial Assets:
Loans held-for-investment	$ 37,224,753	$ 35,297,878	$ 33,276,688

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	May 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved for issuance (in shares)					1,200,000
Shares available for future grants (in shares)	1,597,000		1,597,000
Number of stock options granted			0	0
Stock-based compensation expense	$ 9	$ 3.2	$ 23.9	$ 9.4
Aggregate intrinsic value of options exercised			4.9	7.9
Cash received from option exercises			$ 3.7	$ 10.6
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term			7 years
Stock options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Stock options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			5 years
Restricted shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			1 year
Restricted shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			5 years
LTIP awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Term			7 years
LTIP awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of performance based award payouts			0%
LTIP awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of performance based award payouts			150%
Performance-based stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Performance period			3 years

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans (Summary of Stock Option Activity) (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Common Shares
Common shares, outstanding at beginning of the period (in shares)	193,447	520,663
Common shares, granted (in shares)	0	0
Common shares, exercised (in shares)	(88,355)	(245,286)
Common shares, forfeited or canceled (in shares)	(1,430)	(590)
Common shares, outstanding at end of the period (in shares)	103,662	274,787
Common shares, exercisable (in shares)	103,662	273,238
Weighted Average Strike Price
Weighted average strike price, outstanding at beginning of period (usd per share)	$ 41.62	$ 42.47
Weighted average strike price, granted (usd per share)	0	0
Weighted average strike price, exercised (usd per share)	42.30	43.05
Weighted average strike price, forfeited or canceled (usd per share)	40.87	46.86
Weighted average strike price, outstanding at end of period (usd per share)	41.04	41.95
Weighted average strike price, exercisable (usd per share)	$ 41.04	$ 41.92
Stock Options Additional Disclosures
Remaining contractual term, outstanding	1 year	1 year 4 months 24 days
Remaining contractual term, exercisable	1 year	1 year 4 months 24 days
Intrinsic value, outstanding	$ 4,199	$ 10,557
Intrinsic value, exercisable	$ 4,199	$ 10,506

Stock-Based Compensation Plan_4

Stock-Based Compensation Plans (Summary of Plans' Restricted and Performance Share Award Activity) (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Restricted shares
Common Shares
Outstanding, beginning of the period (in shares)	476,813	234,794
Granted (in shares)	223,559	268,429
Vested and issued (in shares)	(61,333)	(13,120)
Expired, canceled or forfeited (in shares)	(18,632)	(12,624)
Outstanding, end of the period (in shares)	620,407	477,479
Vested, but deferred (in shares)	96,554	95,215
Weighted Average Grant-Date Fair Value
Beginning weighted average grant-date fair value (usd per share)	$ 61.33	$ 59.02
Weighted average grant-date fair value, granted (usd per share)	95.98	63.22
Weighted average grant-date fair value, vested and issued (usd per share)	63.85	72.01
Weighted average grant-date fair value, expired, canceled or forfeited (usd per share)	75.26	63.55
Ending weighted average grant-date fair value (usd per share)	73.15	60.90
Weighted average grant-date fair value, vested, but deferred (usd per share)	$ 52.94	$ 52.39
Performance-based stock
Common Shares
Outstanding, beginning of the period (in shares)	557,255	482,608
Granted (in shares)	160,463	208,732
Vested and issued (in shares)	0	0
Expired, canceled or forfeited (in shares)	(172,001)	(132,998)
Outstanding, end of the period (in shares)	545,717	558,342
Vested, but deferred (in shares)	35,561	35,040
Weighted Average Grant-Date Fair Value
Beginning weighted average grant-date fair value (usd per share)	$ 62.94	$ 71.15
Weighted average grant-date fair value, granted (usd per share)	97.15	58.97
Weighted average grant-date fair value, vested and issued (usd per share)	0	0
Weighted average grant-date fair value, expired, canceled or forfeited (usd per share)	71.51	86.51
Ending weighted average grant-date fair value (usd per share)	70.30	62.94
Weighted average grant-date fair value, vested, but deferred (usd per share)	$ 44.21	$ 43.53

Shareholders' Equity And Earn_3

Shareholders' Equity And Earnings Per Share (Narrative) (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended			3 Months Ended				9 Months Ended		12 Months Ended
	Jun. 30, 2022	May 31, 2020	Jun. 30, 2015	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2021
Temporary Equity [Line Items]
Cash dividends declared per common share (usd per share)				$ 0.34	$ 0.34	$ 0.34	$ 0.31	$ 1.02	$ 0.93
Forecast
Temporary Equity [Line Items]
Cash dividends declared per common share (usd per share)										$ 1.36
Series D Preferred Stock
Temporary Equity [Line Items]
Sale of stock (in shares)			5,000,000
Sale of stock, proceeds			$ 125
Preferred stock, liquidation value per share (usd per share)			$ 25	25			25	25	25		$ 25
Preferred stock, dividend rate, percentage			6.50%
Series D Preferred Stock | London Interbank Offered Rate (LIBOR)
Temporary Equity [Line Items]
Preferred stock, dividend rate, percentage, variable spread			4.06%
Series E Preferred Stock
Temporary Equity [Line Items]
Sale of stock (in shares)		11,500
Sale of stock, proceeds		$ 287.5
Preferred stock, liquidation value per share (usd per share)		$ 25,000		$ 25,000			$ 25,000	$ 25,000	$ 25,000		$ 25,000
Preferred stock, dividend rate, percentage		6.875%
Series E Preferred Stock | US Treasury (UST) Interest Rate
Temporary Equity [Line Items]
Dividend rate, spread on floating rate		0.06507
6.875% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E, no par value
Temporary Equity [Line Items]
Sale of stock (in shares)		11,500,000
Public Offering | Common stock
Temporary Equity [Line Items]
Sale of stock (in shares)	3,450,000
Sale of stock, proceeds	$ 285.7

Shareholders' Equity And Earn_4

Shareholders' Equity And Earnings Per Share (Components Of Other Comprehensive Income or Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 4,727,623	$ 4,339,011	$ 4,498,688	$ 4,115,995
Other comprehensive loss during the period, net of tax, before reclassifications	(211,652)	(13,393)	(463,203)	(27,933)
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	(4,007)	4,717	478	14,084
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(32)	(40)	(95)	(116)
Total other comprehensive loss	(215,691)	(8,716)	(462,820)	(13,965)
Ending balance	4,637,980	4,410,317	4,637,980	4,410,317
Accumulated Unrealized (Losses) Gains on Securities
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(264,790)	30,189	8,724	70,737
Other comprehensive loss during the period, net of tax, before reclassifications	(141,758)	(10,374)	(415,026)	(50,265)
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	(9)	(256)	(192)	(837)
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(32)	(40)	(95)	(116)
Total other comprehensive loss	(141,799)	(10,670)	(415,313)	(51,218)
Ending balance	(406,589)	19,519	(406,589)	19,519
Accumulated Unrealized Gains (Losses) on Derivative Instruments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	57,801	7,720	27,111	(23,090)
Other comprehensive loss during the period, net of tax, before reclassifications	(52,072)	1,631	(26,050)	22,493
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	(3,998)	4,973	670	14,921
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	0	0	0	0
Total other comprehensive loss	(56,070)	6,604	(25,380)	37,414
Ending balance	1,731	14,324	1,731	14,324
Accumulated Foreign Currency Translation Adjustments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(36,048)	(27,776)	(31,743)	(32,265)
Other comprehensive loss during the period, net of tax, before reclassifications	(17,822)	(4,650)	(22,127)	(161)
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	0	0	0	0
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	0	0	0	0
Total other comprehensive loss	(17,822)	(4,650)	(22,127)	(161)
Ending balance	(53,870)	(32,426)	(53,870)	(32,426)
Accumulated other comprehensive income (loss)
Activity Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(243,037)	10,133	4,092	15,382
Total other comprehensive loss	(215,691)	(8,716)	(462,820)	(13,965)
Ending balance	$ (458,728)	$ 1,417	$ (458,728)	$ 1,417

Shareholders' Equity And Earn_5

Shareholders' Equity And Earnings Per Share (Other Comprehensive Income Reclassified from AOCI) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
(Losses) gains on investment securities, net	$ 11	$ 350	$ 262	$ 1,144
Income tax expense	(57,080)	(40,605)	(140,517)	(133,357)
Interest on deposits	45,916	19,305	79,755	71,547
Interest on junior subordinated debentures	2,809	2,744	6,426	8,172
Net income	142,961	109,137	364,865	367,394
Reclassification Out of Accumulated Other Comprehensive Income | Accumulated unrealized (losses) gains on securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
(Losses) gains on investment securities, net	12	350	262	1,144
Income before taxes	12	350	262	1,144
Income tax expense	(3)	(94)	(70)	(307)
Net income	9	256	192	837
Reclassification Out of Accumulated Other Comprehensive Income | Accumulated unrealized gains on derivative instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before taxes	5,451	(6,780)	(914)	(20,342)
Income tax expense	(1,453)	1,807	244	5,421
Interest on deposits	(5,563)	4,947	(87)	14,898
Interest on other borrowings	112	636	1,001	1,958
Interest on junior subordinated debentures	0	1,197	0	3,486
Net income	$ 3,998	$ (4,973)	$ (670)	$ (14,921)

Shareholders' Equity And Earn_6

Shareholders' Equity And Earnings Per Share (Computation Of Basic And Diluted Earnings Per Common Share) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Equity [Abstract]
Net income	$ 142,961	$ 109,137	$ 364,865	$ 367,394
Less: Preferred stock dividends	6,991	6,991	20,973	20,973
Net income applicable to common shares	$ 135,970	$ 102,146	$ 343,892	$ 346,421
Weighted average common shares outstanding (in shares)	60,738	57,000	58,679	56,985
Dilutive potential common shares (in shares)	837	753	814	728
Weighted average common shares and effect of dilutive potential common shares (in shares)	61,575	57,753	59,493	57,713
Net income per common share:
Basic (usd per share)	$ 2.24	$ 1.79	$ 5.86	$ 6.08
Diluted (usd per share)	$ 2.21	$ 1.77	$ 5.78	$ 6